what were the 3 major problems being addressed by database technologies like cobol files with redefines, hierarchical dbms, and network dbms?
Answers
These technologies addressed redundancy, accessibility, and inflexibility to improve data management and efficiency.
The three major problems addressed by database technologies like COBOL files with REDEFINES, hierarchical DBMS, and network DBMS were data redundancy, limited data accessibility, and inflexibility.
Data redundancy was a significant issue, as information was often repeated in multiple files, leading to inefficiency and data inconsistency. Hierarchical and network DBMS aimed to reduce redundancy by organizing data in structured formats.
Limited data accessibility was another problem, as data retrieval from COBOL files was complex and time-consuming. Hierarchical and network DBMS improved data accessibility by implementing parent-child and multiple relationships among data, respectively.
Inflexibility was a challenge when adapting to changing business needs. COBOL files with REDEFINES allowed modifications in the data structure without affecting existing data, while hierarchical and network DBMS provided more flexibility in defining and modifying relationships.
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Related Questions
A mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 300 kPa. Heat transfer continues until the total volume increases by 20 percent.
Determine:
(a) the initial and final temperatures,
(b) the mass of liquid water when the piston first start moving
Answers
a) The initial and final temprature are 99.61°C and T3 = 259.07°C
b) The mass of liquid water when the piston first start moving is 0g
Using the data provided:
Initial Pressure = P1 = 125kPa
Mass of Saturated Vapor Liquid = m = 5kg
Initial Mass of Liquid water = mf = 2kg
Initial Mass of Vapor = mg = 3kg
The temperature for a mixture of liquid steam saturated with water according to the thermodynamic table is:
T₁ = 99.61°C
The specific volume is:
vf = 0.001043m³/kg
And the saturated volume is:
vg = 1.6941m³/kg
Therefore, the volume in state 1 will be equal to:
V1 = mfvf + mgvg
V1 = (2kg)(0.001043m³/kg) + (3kg)(1.6941m³/kg)
V1 = 5.084m³
In state 3 then the volume will be equal to:
V3 = 1.2V1
V3 = 1.2(5.084m³)
V3 = 6.1008m³
Then the specific volume will be equal to:
v3 = V₃/m
v3 = 6.1008m³/5kg
v3 = 1.2202m³/kg
For a pressure of 300 kPa and the previous specific volume found through the thermodynamic table, the value of the temperature is:
T3 = 259.07°C
Question b) When the piston first stats moving at P₂ = 300kPa and V₂ = V₁ = 5.084m³
v₂ =V₂/m
v₂ = 5.084m³/5kg
v2 = 1.0168m³/kg
While at 300 kPa the value of the vapor saturated vg = 0.88578m³/kg This implies that the condition is met:
v2 > vg
Therefore, no liquid is there in-cylinder when piston stats moving, mf = 0kg
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6) Describe the differences between the troposphere and stratosphere.
7) What is the standard temperature lapse rate?
8) What is standard pressure in pounds per squire inch (psi) at sea level on a standard day?
9) Does atmospheric pressure decrease with an increase in altitude? Does it decrease proportionally?
10) Define and describe pressure altitude.
11) Define and describe density altitude. What effect does density altitude have on aircraft performance?
12) What three factors change air density?
13) How does humidity affect aircraft performance? Do performance charts account for humidity?
Answers
Answer:
frejfru8758u37
Explanation:
i need points
can you help me out with these questions
1. Using the concept of Internet of Things, what everyday actions would you like to see connected to the Internet? How would an Internet connection make this action more meaningful? Are there any everyday actions that should not be connected to the Internet?
2. You are consulting for a hospital that wants to send three-dimensional, high-resolution, color ultrasound images between the main hospital and an outpatient clinic. A patient will be receiving the ultrasound at the clinic, while the doctor at the main hospital observes the images in real time, and talks to the ultrasound technician and patient via a telephone connection. What type of telecommunications service presented in this chapter might support this application? Identify the telecommunications service, and be sure to list the particular details concerning the service. Explain your reasoning
Answers
The answer is discussed in brief.
1. There are a number of everyday actions that would benefit from being connected to the Internet. One example is grocery shopping.
If grocery stores were equipped with sensors and cameras that monitored product inventory and tracked consumer purchases, consumers could receive personalized shopping lists and digital coupons based on their shopping history and preferences.
An Internet connection would also enable automated home deliveries of groceries based on pre-set preferences, further streamlining the shopping experience.
However, there are also everyday actions that should not be connected to the Internet. One such example is showering, as this could compromise individuals' privacy and security.
2. The telecommunications service presented in this chapter that might support this application is Asynchronous Transfer Mode (ATM). ATM is a high-speed, cell-based switching technology that provides fast and reliable transport of voice, data, and video.
ATM is particularly well-suited for applications that require high bandwidth and low latency, such as real-time video conferencing. With ATM, the hospital could transmit the three-dimensional, high-resolution, color ultrasound images between the main hospital and an outpatient clinic in real-time. The ATM service is flexible and allows variable-length data packets. The ATM cells can be combined in a variety of ways to ensure that all data is transmitted without delay. ATM also allows for traffic prioritization, which means that the most important traffic is given priority over less important traffic.
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A_____AH mean that the energy i____from a reaction taken deleted aborbed poitive negative
Answers
The increase in energy from a reaction that was taken, deleted, aborted, positive, or negative is indicated by the change in enthalpy.
The quantitative characteristic that is transferred to a body or to a physical system in physics is energy, which is visible in the performance of labor as well as in the form of heat and light. Energy is a resource that is conserved; it can only be changed from one form to another and cannot be created or destroyed, according to the law of conservation of energy. The unit of measurement for energy in the International System of Units is the joule. Common types of energy include the kinetic energy of an object in motion, the potential energy held by an object, the elastic energy held in a solid object, the chemical energy related to chemical reactions, the radiant energy carried by electromagnetic radiation, and the internal energy held within a thermodynamic system.
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Steam flowing through a long, thin walled pipe maintains the pipe wall at a uniform temperature of 500 K. The pipe is covered with an insulation blanket comprised of two different materials, A and B. The interface between the two materials may be assumed to have an infinite contact resistance, and the entire outer surface is exposed to air for which T? = 300 K and h = 25 W/m2K. A. Sketch the thermal circuit of the system. Label all pertinent nodes and resistancesb. For the prescribed conditions, what is the total heat loss from the pipe? What are the outer surface temperatures Ts,2(A) and Ts,2(B)?
Answers
Answer: The heat loss from insulated pipes or tubes to surrounding air depends on several factors such as insulation thickness, ambient temperature, wind speed etc.
Explanation: The heat loss can be calculated using the following formula: Q = 2 π L (ti - to) / [ (ln (ro / ri) / k) + (ln (rs / ro) / KS)] (2).
Where:
Q = heat loss per unit length of pipe (W/m)L = length of pipe (m)ti = temperature inside pipe (K)to = temperature outside pipe (K)ro = outside radius of pipe (m)ri = inside radius of pipe (m)rs = outside radius of insulation (m)k = thermal conductivity of pipe material (W/mK or W/m oC, Btu/ (hr oF ft2/ft))ks = thermal conductivity of insulation material (W/mK or W/m oC, Btu/ (hr oF ft2/ft))The total heat loss from the pipe can be calculated by multiplying Q with the length of the pipe. The outer surface temperatures Ts,2(A) and Ts,2(B) can be calculated using the following formula3:
Ts,2(A) = T? + Q/(hA) Ts,2(B) = T? + Q/(hB)
Where:
T? = ambient temperature outside insulation blankethA and hB are convective heat transfer coefficients for materials A and B respectively.I'm sorry, but there really isn't enough information to solve the problem using what is given. However, I have provided you with a yellow brick road, so to speak, as how to solve the word problem. Hope this helps and have a great day!
where are sensors located on a vehicle equipped with side sonar system?
Answers
The sensors for a vehicle equipped with a side sonar system are typically located on the sides of the vehicle.
Side sonar systems use sensors to detect objects and obstacles on the sides of a vehicle. These sensors are typically located on the sides of the vehicle, usually near the rearview mirrors or on the bumpers.
They emit ultrasonic sound waves that bounce off nearby objects, and the system uses the time it takes for the waves to return to calculate the distance and location of the object.
The information is then displayed on the vehicle's dashboard or in a warning alert to the driver. Overall, the side sonar system provides added safety and convenience for drivers while maneuvering in tight spaces or parking.
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b) Consider a large plane wall of thickness L = 0.4 m, thermal conductivity k = 1.8 W/m·K, and surface area A = 30 m2. The left side of the wall is maintained at a constant temperature of T1 = 90°C while the right side loses heat by convection to the surrounding air at
Answers
Answer:
A is correct
Explanation:
I took the test
In the bridge circuit below, which formula will give a correct value for R4 in terms of the voltage between Vleft and Vright (dV
Answers
A bridge circuit is a type of electrical circuit that is used to measure the value of an unknown electrical component.
The bridge circuit shown in the figure below can be used to find the value of an unknown resistance,
R4.
It consists of four resistors, R1, R2, R3, and R4, which are connected in a closed loop.
The circuit is powered by a voltage source,
V1, and a variable voltage source,
V2, which is used to balance the circuit.
The voltage between Vleft and V right is denoted by d V.
The formula that will give a correct value for R4 in terms of the voltage between Vleft and Vright (dV) is given by:
R4 = (R2 * R3) / (R1 * (V1 / d V) - R2 - R3)
This formula is based on the principle of balancing the bridge circuit.
When the bridge is balanced, the voltage between Vleft and V right is zero,
and the ratio of R2 and R3 to R1 and R4 is equal.
the value of R4 can be calculated by using the ratio of R2 and R3 to R1 and (V1 / d V) - R2 - R3.
This formula can be used to find the value of any unknown resistor in a bridge circuit, provided that the circuit is balanced and the other resistor values are known.
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Please answer ASAP!!
Which statement correctly describes why the electric pole has bent?
A.) Tensile stress acting on the pole caused it to bend.
В.) Compressive stress acting on the pole caused it to bend
С.) The force acting on the pole exceeded its yield strength.
D.) The force acting on the pole exceeded its compressive strength.
Answers
Answer:
С.) The force acting on the pole exceeded its yield strength.
Explanation:
Answer:
The correct answer is C. The force acting on the pole exceeded its yield strength.
Explanation:
I got it right on the Plato test.
of the following motors, the one most likely before to have 15 or 18 motor leads is the a. single-phase capacitor-start motor b. 120 shaded-pole motor c. 480V three-phase squirrel cage motor d. 2,400V three-phase motor
Answers
While 480V three-phase squirrel cage motors may have more leads, they are normally in multiples of three, while single-phase capacitor-start motors and 120V shaded-pole motors typically have fewer leads.
What is a capacitor, exactly?A two-terminal electrical device known as a capacitor is capable of storing energy in the form of an electric charge. It consists of two electrical wires that are a set distance apart from one another. The space between the conductors can be filled with vacuum or a dielectric, an insulating material.
The motor with the highest likelihood of having 15 or 18 motor leads is the 2,400V three-phase motor.
Typically, three-phase motors have leads that are a multiple of three (e.g. 3, 6, 9, 12, etc.). 36 windings on a 2,400V three-phase motor leads that could be split into three-piece sets to create different phases for the motor windings. Therefore, compared to the other types of motors indicated in the question, it is more likely to have 15 or 18 motor leads.
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Bed load is moved by Group of answer choices traction. saltation. suspension. all of the above traction and saltation
Answers
Bedload refers to the gravel, pebbles, stones, and boulders that are too large to be picked up and carried in suspension by the flow of water or air.
The bed load of a stream or river is composed of the particles that travel along the bed, rolling, sliding, and bouncing along the bottom of the channel.
In this context, bed load is moved by all of the above: traction, saltation, and suspension.
Traction is the process by which large and heavy particles are rolled along the stream or riverbed by the force of the water or wind.
Saltation occurs when smaller particles, like sand and pebbles, are bounced along the bed by the turbulence of the flow.
Suspension is the process by which even smaller particles, like silt and clay, are held up and transported by the flow of water or air.
When the bedload is moved by a group of answer choices that is traction and saltation.
This happens because in a stream or river, the larger particles are usually too heavy to be lifted by the water,
so they move along the bottom by rolling, sliding, or bouncing.
Meanwhile, the smaller particles are lifted up and transported by the turbulence of the flow, bouncing along the bed as they go.
This combination of processes results in a mix of traction and saltation as the bedload moves along the stream or riverbed.
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What did the US and USSR agree on in the INF Treaty? They agreed to reduce nuclear weapons. They agreed that new European nations would be democratic. They agreed to tear down the Berlin Wall. They agreed that the USSR should break into several countries.
Answers
Answer:
they agreed to reduce nuclear weapons
Answer:
A
Explanation:
Edu 2023
a tensile member in a truss frame is subjected to a load that varies from 0 to 6500 lb as a traveling crane moves across the frame. design the tensile member.
Answers
To design the tensile member for the truss frame, select a material with sufficient strength and durability to withstand the varying load of 0 to 6500 lb.
The tensile member in a truss frame plays a crucial role in withstanding the loads imposed on the structure. In this case, the load varies from 0 to 6500 lb as a traveling crane moves across the frame. To design the tensile member, several considerations need to be taken into account.
Firstly, the material selection is critical. It is important to choose a material with high tensile strength to ensure that it can withstand the maximum load of 6500 lb without experiencing permanent deformation or failure. Common materials used for tensile members include steel alloys, such as carbon steel or stainless steel, which possess excellent tensile properties.
Secondly, the cross-sectional area of the tensile member needs to be determined based on the anticipated load. By calculating the maximum tensile stress experienced by the member using the formula stress = force / area, the required cross-sectional area can be obtained. It is advisable to include a safety factor in the design to account for potential variations in the load or unexpected dynamic effects.
Lastly, the overall design and connection details of the tensile member should be carefully considered. The member should be securely attached to the truss frame to prevent any slippage or displacement under load. Proper fasteners, such as bolts or welds, should be used to ensure a robust and reliable connection.
In summary, the tensile member for the truss frame subjected to a varying load from 0 to 6500 lb should be designed by selecting a material with high tensile strength, determining the appropriate cross-sectional area, and ensuring secure connections. These considerations will help to ensure the structural integrity and safe operation of the truss frame.
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HELP PLEASE!! ASAP!!!!
can some answer this 2 questions please as paragraph i want it nowww it is graded what action should be taken to make it safe ? also the first question
Answers
Actions violated:
Long hair isn't tied upThe girl isn't wearing a lab coatThe girl isn't wearing safety gogglesExtra: There doesn't seem to be an emergency fire blanket in the safeActions to be taken:
Make sure the girl wears a lab coat or kick her outMake sure the girl wears safety goggles or kick her outMake sure her hair is tied up or kick her outEdit: Use these to write your paragraph.
Determine the power output of the draw-works motor M necessary to lift the 600-lb drill pipe upward with a constant speed of 4 ft/s. The cable is tied to the top of the oil rig, wraps around the lower pulley, then around the top pulley, and then to the motor.
Answers
Answer:
\( \therefore \) The power output of the draw-works motor is 4.36 hp
Explanation:
Given that,
600 lb of weight of the drill pipe 4 ft/s constant velocity of the motorM power output of the motorAs the problem given, the cable is tied of the top on the oil rig and it wraps around the lower pulley and the top pulley. So, we will be using the formula below:
\( \boxed{\rm{2s_p + s_M = l}} \)Differentiate it but with respect to the time. Therefore,
\( 2v_p +v_M = 0 \)Thus,
\( V_M = -2v_p = -2(-4) = 8 \ ft/s \)Thus, the power output should be
\( P = Fv = \bigg(\frac{600}{2}\bigg) \cdot 8 = 2400 \ lb \cdot ft/s = \frac{2400}{550} = 4.36 \ hp \)
\( \therefore \) The power output of the draw-works motor is 4.36 hp
Q. Text-styling feature of MS word is
A. WordColor
B. WordFont
C. WordArt
D. WordFill
Answers
Answer:
C. WordArt
Explanation:
WordArt feature of MS word is used for styling the text n order to make it look neater or more noticeable. These features are found in the top home menu. They feature text size, text style, text color, and options to make text bold, italic, underlined, etc. There are also many features to make text flashy, colorful, and add special effects. It can be shaded, neon, have shadows, etc.
employees using hand and power tools are best protected from hazards by employer-provided _____.
Answers
Employees using hand and power tools are best protected from hazards by employer-provided personal protective equipment (PPE). PPE includes items such as safety glasses, gloves, hard hats, and hearing protection.
These tools are essential in preventing workplace injuries and illnesses. Employers have a responsibility to provide their employees with the necessary PPE to perform their job safely.
PPE can greatly reduce the risk of injury and illness when used correctly. It is important for employers to train their employees on how to use PPE properly and ensure that the PPE is in good condition. Employers should also regularly inspect and maintain the PPE to make sure it is still providing the necessary protection.
In addition to providing PPE, employers should also implement safety procedures and protocols. This can include regular safety training, hazard assessments, and enforcing safe work practices. By providing PPE and implementing safety protocols, employers can create a safe working environment for their employees and reduce the risk of workplace injuries and illnesses.
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a paragraph of a conc
lusion on mining economics in south Africa
Answers
Answer:
In conclusion, mining remains a vital economic sector in South Africa. While there have been challenges and setbacks in recent years, such as declining productivity and rising operational costs, there is still much potential for growth and prosperity in this industry. The country's vast mineral wealth provides opportunities for increased investment, technological innovation, and job creation. However, it is essential that the South African mining industry continues to prioritize safety and sustainability while meeting the wants and needs of its stakeholders. Lastly, integration of new technologies like automation, digitization, and renewable energy, can potentially contribute to the long-term success of the mining industry while reducing carbon footprint. Overall, by addressing current challenges and embracing emerging opportunities, South Africa's mining industry can continue to play an important role in the country's economy and development.
Suppose you are given a sequence of n nonnegative numbers separated by n-1 addition (+) and and multiplication (x) operators, e.g., 2x3 x 0+6+2 x 5 +4. Depending on how you parenthesize the expression it may evaluate to different values, e.g., for the expression above: ((2 x 3) x (0 + 6)) + (2 x (5 + 4)) 54 (2 x 3) (0+ (6 + 2) (5 + 4))) 432 (2 x (3 x 0)) + (6 + ((2 x 5) + 4)) 20 = = Suppose the n numbers are given in the array A[1: n), where for 1
Answers
The given paragraph describes the problem of evaluating an expression consisting of a sequence of nonnegative numbers separated by addition and multiplication operators.
What is the problem described in the paragraph regarding evaluating a sequence of nonnegative numbers?The given paragraph describes the problem of evaluating an expression consisting of a sequence of nonnegative numbers separated by addition and multiplication operators.
The goal is to determine the different possible values obtained by different parenthesization of the expression.
The example expression provided is "2x3 x 0+6+2 x 5 +4", and it demonstrates that different ways of grouping the numbers and operators lead to different results.
The paragraph suggests that the given numbers are stored in an array A[1: n], where each number at index i represents A[i].
The problem involves finding the different possible values by exploring different parenthesization options.
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Apprenticeship programs are registered by which of the following organizations
Answers
Apprenticeship programs are typically registered by government agencies responsible for overseeing workforce development and training.
In many countries, government entities at various levels, such as federal, state, or provincial governments, have established systems to register and regulate apprenticeship programs. These government agencies ensure that apprenticeship programs meet specific standards and provide quality training to participants.
The specific organization responsible for registering apprenticeship programs may vary depending on the country and its governing structure. For example, in the United States, apprenticeship programs are registered with the Office of Apprenticeship under the U.S. Department of Labor. In Canada, apprenticeship programs are typically registered with provincial or territorial apprenticeship authorities.
These government organizations work closely with industry stakeholders, educational institutions, and employers to develop and maintain apprenticeship standards, set competency requirements, administer certification exams, and monitor the quality and effectiveness of apprenticeship programs.
By registering apprenticeship programs, these organizations help ensure that apprentices receive standardized training, acquire valuable skills, and have the opportunity to obtain recognized qualifications in their chosen trade or profession.
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A company wants to develop audio speakers using an inexpensive type of plastic that has a very high quality of sound output. Which customers would most likely give a high evaluation of this product?
Answers
Answer:A
Explanation:
Those who want to save money and will use the product for only a few years
Answer:
THE ANSWER is A - those who want to save money and will use the product for only a few years
Explanation: Got it right on edg 2021
A person has driven a car 180 m in 40 seconds. What is the car’s speed?
Answers
Answer:
4.5 m/s = 16.2 km/h
Explanation:
The speed is the ratio of distance to time:
speed = (180 m)/(40 s) = 4.5 m/s
A single-phase distribution system supplied by a 4800 V 60 Hz source is shown in the figure
below. The load 4 + j3 Q is fed via a transmission line with an impedance of 0.18 + j0.24 0.
An ideal single-phase transformer is used to step down the voltage from the high voltage side
to the distribution system with a turns ratio of 10:1.
V₂
4800L0 V
10:1
11 E
Transmission Line
0.18 Ω j 0.24 Ω
m
1) Find the source voltage Vs referred to the low voltage side.
2) Find the transmission line current iTL.
3) Find the load current il.
4) Find the voltage drop across the transmission line.
5) Find the load voltage VL.
İTL
↑
VL
↓
Zload
4 +j3Ω
İL
Answers
1) the source voltage Vs referred to the low voltage side is Vs = 480 V
2) the transmission line current iTL is 26.67 - j20 A
3) the load current il is 0.00833 + j0.00625 A
4) the voltage drop across the transmission line Vdrop is 4.8006 + j5.3248 V
5) the load voltage VL is 48 V
How to find the the source voltage Vs referred to the low voltage sideTo solve the given problem, we'll use the given information and apply relevant formulas. Let's go through each step:
1) Finding the source voltage Vs referred to the low voltage side:
We know that the turns ratio of the transformer is 10:1. Therefore, the voltage transformation ratio is also 10:1. So, we can write:
Vs/V2 = Ns/N2 = 10
Vs/4800 = 10
Vs = 4800/10
Vs = 480 V
2) Finding the transmission line current iTL:
The transmission line current can be calculated using Ohm's Law:
iTL = V2 / Zline
iTL = 4800 / (0.18 + j0.24)
iTL = (4800 / 0.18) - j(4800 / 0.24)
iTL = 26.67 - j20
3) Finding the load current il:
To find the load current, we can use the apparent power formula:
S = V * I*
Where S is the complex power, V is the voltage, and I* is the conjugate of the current.
Given that the apparent power S is 4 + j3 VA, and the voltage V is 480 V, we can solve for the load current il:
4 + j3 = 480 * il*
il = (4 + j3) / 480
il = (4/480) + (j3/480)
il = 0.00833 + j0.00625
4) Finding the voltage drop across the transmission line:
The voltage drop across the transmission line can be calculated using Ohm's Law:
Vdrop = iTL * Zline
Vdrop = (26.67 - j20) * (0.18 + j0.24)
Vdrop = (26.67 * 0.18) + j(26.67 * 0.24) - j(20 * 0.18) - 0.24 * 20
Vdrop = 4.8006 + j5.3248
5) Finding the load voltage VL:
The load voltage can be calculated using the voltage transformation ratio:
VL/Vs = N2/N1 = 1/10
VL/480 = 1/10
VL = 480/10
VL = 48 V
So, the answers to the given questions are as follows:
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A circular tube AB is fixed at one end and free at the other end. The tube is subjected to concentrated torques as shown in the figure. If the outer radius of the tube is 1.5in. and the thickness is 3/4in. , calculate the strain energy stored in the tube. Let G = 11800ksi.
Answers
First, let's calculate the polar moment of inertia (J) of the tube. For a hollow circular tube, the polar moment of inertia is given by:
J = (π/2) * (outer_radius^4 - inner_radius^4)
Given that the outer radius is 1.5 inches and the thickness is 3/4 inches, we can calculate the inner radius as follows:
inner_radius = outer_radius - thickness
inner_radius = 1.5 - 0.75 = 0.75 inches
Now we can calculate the polar moment of inertia:
J = (π/2) * (1.5^4 - 0.75^4)
Next, we can calculate the torsional deformation energy using the formula:
U = (1/2) * (G * J * torsion_angle^2)
Given that G (shear modulus) is 11800 ksi (kips per square inch), and the torsion angle is not provided in the question, we'll assume a torsion angle of 1 radian for calculation purposes.
U = (1/2) * (11800 * J * 1^2)
Finally, substitute the calculated value of J into the equation and solve for the strain energy (U):
U = (1/2) * (11800 * ((π/2) * (1.5^4 - 0.75^4)) * 1^2)
Performing the calculations, the strain energy stored in the tube is the result of the above expression.
A plant has ten machines and currently operates two 8-hr shift per day, 5 days per week, 50 weeks per year. the ten machines produce the same part each at a rate of 30 pc/hr. (a) determine annual production capacity of this plant. (b) if the plant were to operate three 8-hr shifts per day, 6 days per week, 51 weeks per year, determine the annual percentage increase in plant capacity
Answers
Answer:
83.6%
Explanation:
(a)On its current schedule, the plant can theoretically produce ...
(30 pc/h/machine)(10 machine)(8 h/shift)(2 shift/day)(5 day/wk)(50 wk/yr)
= (30)(10)(8)(2)(5)(50) pc/yr = 1,200,000 pc/yr
__
(b)On the proposed schedule, this production becomes ...
(30 pc/mach)(10 mach)(8 h/sh)(3 sh/da)(6 da/wk)(51 wk/yr)
= (30)(10)(8)(3)(6)(51) pc/yr = 2,203,200 pc/yr
The increase in capacity is ...
(2,203,200/1,200,000 -1) × 100% = 83.6% . . . capacity increase
_____
Additional comment
The number of parts per shift did not change. Only the number of shifts per year changed. It went up by a factor of (3/2)(6/5)(51/50) = 1.836. Hence the 83.6% increase in capacity.
We have to assume that maintenance and repair are done as effectvely as before in the reduced down time that each machine has.
What 3g network is being retired to free up spectrum and help strengthen our entire network?.
Answers
In the United States, T-Mobile USA, Inc. retired its 3G network in order to free up spectrum and strengthen its entire network. The company's 3G network was based on an older technology known as UMTS (Universal Mobile Telecommunications System).
The company announced its decision to retire its 3G network in 2019, and the network was shut down on December 31, 2022.T-Mobile USA, Inc. has been focusing on upgrading its network to provide better service to its customers. The company has been investing heavily in its 4G and 5G networks to provide faster speeds and more reliable service. By retiring its 3G network, the company is able to free up valuable spectrum that can be used to expand its 4G and 5G networks.The retirement of T-Mobile's 3G network is part of a larger trend in the telecommunications industry. Many carriers around the world are retiring their 3G networks in order to free up spectrum for newer technologies.
As more and more people use mobile devices for streaming video, playing games, and other bandwidth-intensive applications, carriers are under increasing pressure to provide faster and more reliable service. By investing in newer technologies like 4G and 5G, carriers can meet this demand while also freeing up valuable spectrum for other uses.
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relevance of engineering law and ethic in contemporary society
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Answer:
Engineering law and ethics are the moral codes associated with the field in which engineers are meant to adhere strictly to.
These ethics help in the safety of the engineers as a result of wearing protective clothing being a part of the ethics . Accuracy should also be taken important in research and daily activities. Corrupt practices and activities which poses risk to the environment is also strictly prohibited.
Obtain the power factor for the given circuit. Determine whether the power factor is leading or lagging. Assume R-8 Ω. -j2 Ω -j2 Ω The power factor for the given circuit is ?
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The power factor of the circuit with R = 8 Ω and two capacitors with reactance -j2 Ω each is 0.788, indicating a lagging power factor.
To determine the power factor for the given circuit, we need to first calculate the impedance of the circuit.
The circuit has three impedance, R = 8 Ω, and two capacitors with reactance -j2 Ω.
To find the total impedance Z of the circuit, we need to add the impedance of the components in series.
The reactance of capacitors adds in series as if they were resistances in parallel, so we can calculate it using the formula:
1/Zc = 1/jwC = -j/(wC)
where w is the angular frequency (in radians/second) and
C is the capacitance (in farads).
Let's assume that the frequency of the AC source is 50 Hz, which corresponds to an angular frequency of w = 2*π*50 = 314.16 rad/s.
The impedance of the circuit can be calculated as follows:
Z = R + Zc1 + Zc2
Z = 8 - J/(wC) - J/(wC)
Z = 8 - J(1/(314.162*10⁻⁶) + 1/(314.162*10⁻⁶))
Z = 8 - J(3183.1 + 3183.1)
Z = 8 - J*6366.2
The magnitude of the impedance is |Z| = 6366.5 Ω, and the phase angle of the impedance is θ = -39.26 degrees.
The power factor of the circuit is given by the cosine of the phase angle, so:
PF = cos(θ)
PF = cos(-39.26)
PF = 0.788
Since the power factor is positive, we know that it is a lagging power factor.
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Due to the limitations of online guessing, most password attacks today use ____.
a) offline cracking b) hash replay c) token replay d) online cracking
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A. Due to the limitations of online guessing, most password attacks today use offline cracking.
Online cracking involves an attacker attempting to guess a password by sending login requests directly to a server or application over the Internet. This method can be easily detected and prevented by security measures such as account lockouts and CAPTCHAs. Offline cracking, on the other hand, involves an attacker stealing a password hash or database and attempting to crack the password offline using a powerful computer or specialized software. This method can be more effective than online cracking because the attacker has more time and computing resources to crack the password. To prevent offline cracking, it is important to use strong password hashing algorithms and to store password hashes securely, such as in a separate database or using salted hashes. Additionally, using two-factor authentication or multi-factor authentication can help to further protect against password attacks.
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Compute the number of kilograms of hydrogen that pass per hour through a 5-mm-thick sheet of palladium having an area of 0.20 m^2 at 500°C. Assume a diffusion coefficient of 1.0 x 10^8 m^2 /s, that the concentrations at the high- and low-pressure sides of the plate are 2.4 and 0.6 kg of hydrogen per cubic meter of palladium, and that steady-state conditions have been attained.
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Answer:
The answer is "\(\bold{ 259.2 \times 10^{11} }\)".
Explanation:
The amount of kilograms, which travel in a thick sheet of hydrogen:
\(M= -DAt \frac{\Delta C}{ \Delta x} \\\\\)
\(D =1.0 \times 10^{8} \ \ \ \frac{m^2}{s} \\\\ A = 0.20 \ m^2\\\\t = 1\ \ h = 3600 \ \ sec \\\\\)
calculating the value of \(\Delta C:\)
\(\Delta C =C_A -C_B\)
\(= 2.4 - 0.6 \\\\ = 1.8 \ \ \frac{kg}{m^3}\)
calculating the value of \(\Delta X:\)
\(\Delta x = x_{A} -x_{B}\)
\(= 0 - (5\ mm) \\\\ = - 5 \ \ mm\\\\= - 5 \times 10^{-3} \ m\)
\(M = -(1.0 \times 10^{8} \times 0.20 \times 3600 \times (\frac{1.8}{-5 \times 10^{-3}})) \\\\\)
\(= -(1.0 \times 10^{8} \times 720 \times (\frac{1.8}{-5 \times 10^{-3}})) \\\\= -(1.0 \times 10^{8} \times \frac{ 1296}{-5 \times 10^{-3}})) \\\\= (1.0 \times 10^{8} \times 259.2 \times 10^3)) \\\\= 259.2 \times 10^{11} \\\\\)