Circular runout tolerance ensures that the surface of revolution maintains a consistent shape and position by applying the tolerance zone to each circular element individually.
When a circular runout tolerance is applied to a surface of revolution, option D is correct: the tolerance zone applies to each circular element of the surface independently. The explanation for this is that circular runout tolerance controls the variation in circularity, perpendicularity, and coaxiality of the surface of revolution throughout its entire length. Each circular element, or cross-sectional slice, is checked independently to ensure that it meets the specified tolerance limits.
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A vibration system consists of a mass 50 kg, a spring of stiffness 30 kN/m and a damper. The
damping provided is only 20% of the critical value. Determine (a) the damping factor, (b) the
critical damping coefficient, (c) the natural frequency of the damped vibrations, (d) the
logarithmic decrement and (e) the ratio of two consecutive amplitudes.
Answer:
20% of the critical value. Determine (a) the damping factor, (b) the
Explanation:
Pls help I will mark brainlesst
Answer:
Ribosomes 1
Explanation
Ribosomes are small structures where proteins are made. Although they are not enclosed within a membrane, they are frequently considered organelles. Each ribosome is formed of two subunits, like the one pictured at the top of this section. Both subunits consist of proteins and RNA
Will a thermal boundary layer develop in flow over a surface even if both the fluid and the surface are at the same temperature?
Answer:
i hope it's correct
Explanation:
A thermal boundary layer will not develop in flow over a surface if both the fluid and the surface are at the same temperature since there will be no heat transfer in that case.
Silicon chips are used primarily in ?
Answer:
4th generation computers
Silicon chips are used primarily in relays. The correct option is B.
What are silicon chips?The brain of the device is made up of silicon chips, which control all of its internal mechanisms. Tablets, smartphones, and laptops are a few examples.
The invention of silicon chips led to the revolutionization and miniaturization of technology, as well as the creation of the contemporary computer.
Instead of the slow computers that used to take up entire rooms, it made it possible to create fast computers that fit in people's homes and eventually portable computers.
Relays are electrically powered switches that operate by receiving electrical signals from other sources to open and close circuits.
Therefore, the correct option is B. relays.
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The question is incomplete. Your most probably complete question is given below:
A. integrated circuits
B. relays
C. motors
D. transformers
1SS For a specific polymer, given at least two density values and their corresponding percent crystallinity values, develop a spreadsheet that allows the user to determine the following: (a) the density of the totally crystalline polymer (b) the density of the totally amorphous polymer (c) the percent crystallinity of a specified density (d) the density for a specified percent crystallinity.
The spreadsheet can be set up to allow for additional density and percent crystallinity values to be inputted, and the formulas will update automatically. With this spreadsheet, the user can easily determine the density and percent crystallinity of the polymer for various values.
To develop a spreadsheet for the given polymer, we can use the following formulas:
(a) Density of totally crystalline polymer = Highest density value given
(b) Density of totally amorphous polymer = Lowest density value given
(c) Percent crystallinity of a specified density = (Density of the specified value - Density of totally amorphous polymer) / (Density of totally crystalline polymer - Density of totally amorphous polymer) x 100
(d) Density for a specified percent crystallinity = Density of totally amorphous polymer + (Specified percent crystallinity / 100) x (Density of totally crystalline polymer - Density of totally amorphous polymer)
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PLEASE HELP!!!
What was Amelia Earhart was the first woman to accomplish?
A Flying around the world
B Flying solo across the Atlantic
C Inventing a jumpsuit for female pilots
D Flying across the English Channel
Answer:
B!
Explanation:
Answer:
B. Flying solo across the atlantic
Explanation:
history class
the number of character comparisons used by the naive string matcher to look for the pattern of in the text love is
The number of character comparisons that are used by the Naive String Matcher to search for the pattern of the text "love" in the text is defined as The naive approach is an elementary algorithm for solving string matching problems.
When looking for a substring in a string, the naive method examines each character in the substring for a match against the text starting at every possible position.
To check whether the pattern occurs in the text or not, the naive algorithm compares each character of the pattern to the corresponding character of the text.
Since there are four characters in the pattern "love," the total number of character comparisons required by the naive string matcher to search for the pattern of "love" in the text would be equal to the length of the text multiplied by the length of the pattern, or more precisely, 4n character comparisons are needed for a text of length n.
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What are the major types of interior walls and partitions in a larger building, such as a hospital, classroom building, apartment building, or office building? How do these types differ from one another? Why is gypsum used so much in interior finishes? Name the coats of plaster used over expanded metal lath and explain the role of each. Under what circumstances would you specify the use of portland cement plaster? Keenes cement plaster? Veneer plaster? Describe step by step how the joints between sheets of gypsum board are made invisible. List the potential range of functions of a finish ceiling and of a finish floor. What are the advantages and disadvantages of a suspended ceiling compared to those of a tightly attached ceiling? When designing a building with its structure and mechanical equipment left exposed at the ceiling, what precautions should you take to ensure a satisfactory appearance? What does underlayment do? How should it be laid? List several different approaches to the problem of running electrical and communications wiring beneath a floor of a building framed with steel or concrete
The major types of interior walls and partitions in a larger building are:
Fire wallFire barrierSmoke barrierWhy is gypsum used so much in interior partitions?It is different because it is more durable than the rest and it is also:
Has a Light weight.It is sound resistance.One can worked on it even if its wet or dry.Conclusively, the coats of plaster that are used over expanded metal lath are:
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1. A saturated soil with a mass of 43.2gr. When dried in the oven its mass was 30gr. The volume of the wet sample is 20 cm3 and the dry sample is 12 cm3. Find the limit of contraction.
2. The unit weight of a saturated soil is 2010 kg/m3, if its Gs = 2.74, determine the dry unit weight(γus), e, n and Moisture content (w (%)).
Please do not do it directly but put formulas also to see the steps.
A saturated soil with a mass of 43.2g. When dried in the oven its mass was 30g, the limit of contraction is 0.4.
For the limit of contraction, we know that:
Limit of contraction (Lc) = (Vw - Vd) / Vw
Lc = (20 - 12) / 20
Lc = 8 / 20
Lc = 0.4
Therefore, the limit of contraction is 0.4.
Now for the dry weight,
Dry unit weight (γd) = γw / (1 + e)
e = (Gs - 1) / Gs
n = e / (1 + e)
w = (wet weight - dry weight) / dry weight
In this case,
γw = 9.81 kN/\(m^3\)
Gs = 2.74.
So,
γd = 2010 / (1 + ((2.74 - 1) / 2.74))
γd = 2010 / (1 + 0.727)
γd = 2010 / 1.727
γd = 1163.54 kg/m^3
e = (2.74 - 1) / 2.74
e = 1.74 / 2.74
e ≈ 0.635
n = 0.635 / (1 + 0.635)
n = 0.635 / 1.635
n ≈ 0.388
w = (43.2 - 30) / 30
w = 13.2 / 30
w ≈ 0.44
Therefore, the dry unit weight (γd) is approximately 1163.54 kg/m^3, the void ratio (e) is approximately 0.635, the porosity (n) is approximately 0.388, and the moisture content (w) is approximately 0.44.
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An 8cm diameter hydraulic cylinder ha 4cm diameter rod if the cylinder receive flow of 100lpm and 12mpa
the radius using a 3-inch diameter cylinder to get a surface area of 7.065 square inches (1.5 x 1.5 x 3.14).
Does hydraulic cylinder size matter?It is true that size matters when it comes to hydraulic cylinders. The size of the cylinder is determined by a number of crucial factors, including its mass, bore diameter, rod diameter, and even how it will move within the hydraulic system.
The standard recommendation for a typical reservoir used in open circuits is a tank oil capacity of three to five times the flow of the pump(s) per minute plus a ten percent air cushion. The general recommendation is 5 to 8 times pump flow per minute for HFC and HFD fire-resistant fluids.
When calculated as the transverse section to the wet perimeter, the equivalent diameter is determined to be two times the hydraulic radius.
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Please do 4a: Determine the semi-major axis (a), radius of apoapsis (\(r_{a}\)), velocity at apoapsis (\(v_{a}\)), radius of periapsis (\(r_{p}\)), eccentricity (e), and semi-latus rectum (p) of the orbit.
The semi-major axis is approximately 5,311.6 km, the radius of apoapsis is approximately 22,316.5 km, the velocity at apoapsis is approximately 0.712 km/sec, the radius of periapsis is approximately 1,306.7 km, the eccentricity is approximately 0.917, and the semi-latus rectum is approximately 844.7 km.
How did we get the values?To determine the required parameters, we can use the vis-viva equation and the formulas for the semi-major axis, eccentricity, and semi-latus rectum of an elliptical orbit:
Semi-major axis (a):
a = (2π/ T)² (μₘ/a)⁻¹/³
where T is the orbital period and μₘ is the gravitational parameter of Mars.
Substituting the given values, we get:
a = (2π/18.6 hr)² (4.269 x 10⁴ km³/sec² / 3397.2 km)⁻¹/³
a ≈ 5,311.6 km
Radius of apoapsis (ra):
ra = a(1 + e)
where e is the eccentricity of the orbit.
Velocity at apoapsis (va):
va = (μₘ/ra)⁰⁵ (2/rp - 1/a)⁰⁵
where rp is the radius of periapsis.
Radius of periapsis (rp):
rp = a(1 - e)
Eccentricity (e):
e = (ra - rp)/(ra + rp)
Semi-latus rectum (p):
p = a(1 - e²)
Now, let's calculate each parameter:
Radius of apoapsis (ra):
We can use the fact that the spacecraft's orbit is highly elliptical to assume that the orbit is nearly a straight line from the periapsis to the apoapsis. Therefore, the spacecraft's position at apoapsis is approximately at the maximum distance from Mars. At this point, the spacecraft's speed is at a minimum, and it is moving only due to the gravitational attraction of Mars. Hence, we can assume that va ≈ 0.
From the given information, we know that the orbital period T = 18 hr 36 m. Therefore, the time taken for one complete orbit from periapsis to apoapsis is half of the period, or T/2 = 9 hr 18 m.
Using the vis-viva equation, we can find the radius of apoapsis:
va² = μₘ(2/rp - 1/a)
0 = μₘ(2/rp - 1/ra)
2ra = rp + ra
ra = 2a - rp
Substituting this expression for ra in terms of a and rp into the equation above, we get:
Up² = μₘ(2/rp - 2/(2a-rp))
Up² = μₘ(2/rp - 1/a + 2/rp - 2/a)
Up² = μₘ(4/rp - 3/a)
ra = (Up²/μₘ)⁻¹ (4/rp - 3/a)⁻¹
ra = (4.269 x 10⁴ km³/sec²)(3600 s/hr)²/(Up)² (4/rp - 3/a)⁻¹
ra ≈ 22,316.5 km
Velocity at apoapsis (va):
We can use the equation derived above:
va = (μₘ/ra)⁰⁵ (2/rp - 1/a)⁰⁵
va ≈ (4.269 x 10⁴ km³/sec² / 22,316.5 km)⁰⁵ (2/3,827.6 km - 1/5,311.6 km)⁰⁵
va ≈ 0.712 km/sec
Radius of periapsis (rp):
We can use the equation ra = 2a - rp to find rp in terms of ra and a:
rp = 2a - ra
rp = 2(5,311.6 km) - 22,316.5 km
rp ≈ 1,306.7 km
Eccentricity (e):
We can use the formula for eccentricity:
e = (ra - rp)/(ra + rp)
e = (22,316.5 km - 1,306.7 km)/(22,316.5 km + 1,306.7 km)
e ≈ 0.917
Semi-latus rectum (p):
We can use the formula for semi-latus rectum:
p = a(1 - e²)
p = 5,311.6 km(1 - (0.917)²)
p ≈ 844.7 km
Therefore, the semi-major axis is approximately 5,311.6 km, the radius of apoapsis is approximately 22,316.5 km, the velocity at apoapsis is approximately 0.712 km/sec, the radius of periapsis is approximately 1,306.7 km, the eccentricity is approximately 0.917, and the semi-latus rectum is approximately 844.7 km.
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The text format of the question in the picture:
The Mars Odyssey spacecraft successfully entered a highly elliptical Mars polar orbit on October 24, 2001 (UTC). Here is the information we have concerning the orbit (note that μₘ = 4.269 x 10⁴ km³/sec² and rₘ = 3397.2 km):
Orbital period = 18 hr 36 m
Up = 4.582 km/sec
a) Determine the semi-major axis (a), radius of apoapsis (ra), velocity at apoapsis (va), radius of periapsis (rp), eccentricity (e), and semi-latus rectum (p) of the orbit.
PLO10: communicate effectively on well-defined engineering activities with the engineering community and with society at large, by being able to comprehend the work of others, document their own work, and give and receive clear instructions CLO3: Demonstrate understanding of electronic circuit. CLS3: Knowledge & Understanding
QUESTION 1. What is drone? 2. What is the application of drone? 3. How drone help in community? 4. How drone help in job opportunity or business?
Drone refers to an unmanned aircraft that can fly autonomously or be remotely operated by a human pilot. Drones are used for a variety of applications, including military and commercial purposes.
A drone, also known as an unmanned aerial vehicle (UAV), is an aircraft without a human pilot on board. It is controlled remotely or can fly autonomously. Drones are commonly used in military applications, as well as for commercial, scientific, and recreational purposes. Drones range in size from small handheld models to larger aircraft that can carry heavy payloads.
Drones are used for a variety of applications, including:Surveillance and reconnaissance
Search and rescue
Aerial photography and videography
Delivery of goods and packages
Inspection of infrastructure such as power lines and bridges
Mapping and surveying
Weather monitoring and research
Drones can help communities in a variety of ways, including:
Disaster response and relief
Efficient delivery of medical supplies and equipment
Search and rescue operations
Wildlife conservation and monitoring
Agriculture monitoring and management
Traffic monitoring and control
Drones can create new job opportunities in a variety of fields, including:
Drone pilots and operators
Aerial photographers and videographers
Data analysts and surveyors
Drone manufacturers and retailers
Consultants and trainers in drone-related fields
Entrepreneurs who develop drone-related businesses and services
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Meter loading refers to inaccurate readings due to the meter’s resistance being in parallel with the component being tested.
a. true
b. false
b. false Meter loading refers to inaccurate readings due to the meter's resistance being in series with the component being tested, not in parallel.
When a meter is connected in series with a component, the meter's internal resistance creates a voltage drop that affects the measurement of the component's voltage or current.
The internal resistance of a meter forms a voltage divider with the component's resistance, causing a voltage drop across the meter itself. This voltage drop reduces the voltage or current being measured, leading to inaccurate readings. The extent of the error depends on the relative magnitudes of the meter's internal resistance and the component's resistance.
To minimize meter loading and obtain more accurate readings, meters with high input impedance (low internal resistance) are used. These high-impedance meters minimize the voltage drop across the meter and have minimal impact on the circuit being measured.
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g If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is 31.0
A) The amount of space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 31.0 °C is; 0.6048 cm
B) The stress in the rails on a summer day when their temperature is 31.0 °C is; 86.4 × 10⁶ Pa
Linear Thermal Expansion
We are given;
Length; L = 14 m
Initial Temperature; T_i = −5 °C
Final Temperature; T_f = 31 °C
The formula for Linear Thermal Expansion is;
ΔL = L_i * α * ΔT
where;
L_i is initial length
α is thermal expansion
ΔL is change in length
ΔT is change in temperature
Now, the thermal expansion of steel from online tables is α = 1.2 × 10⁻⁵ C⁻¹
Thus;
ΔL = 14 * 1.2 × 10⁻⁵ * (31 - (-5))
ΔL = 6.048 × 10⁻³ m = 0.6048 cm
The formula to get the stress is;
σ = Y * α * ΔT
where;
Y is young's modulus of steel = 20 × 10¹⁰ Pa
α is thermal expansion
ΔT is change in temperature
Thus;
σ = 20 × 10¹⁰ × 1.2 × 10⁻⁵ × (31 - (-5))
σ = 86.4 × 10⁶ Pa
The complete question is;
Steel train rails are laid in 14.0-m long segments placed end to end. The rails are laid on a winter day when their temperature is −5 °C.
(a) How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 31.0 °C?
(b) If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is 31.0 °C?
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Assuming that the quantities of solid wastes generated daily at a commercial facility are distributed normally, with a mean value of 10 yd3 and a standard deviation of 7 yd3, what size container would you recommend for this facility? What are the important tradeoffs in the selection of container size?
Answer:
The distributions of solid wastes produced daily at a commercial facility are normally distributed with a mean of 10 yd3 and a standard deviation of 7 yd3. If you were to make a container size recommendation for this facility, what size would you propose? What important tradeoffs should be considered when selecting the size of the container?
It's quite perplexing to determine the perfect size of container for a facility whose waste quantity varies and is subject to changes frequently. A certain degree of burstiness is present in the distribution of solid waste generated on a daily basis in a commercial facility. However, using the available mean and standard deviation values, we can infer that a container size of 24 yd3 should be sufficient to hold the daily waste generated, considering that it's two standard deviations above the mean.
When selecting a container size, various tradeoffs must be considered. A large container is more efficient, as it would not require to be emptied as frequently, but it might be expensive and may take up more space. A smaller container may be less expensive and take up less space, but it would need to be emptied more frequently, which can result in higher transportation costs and more time spent on waste management. It is therefore essential to strike a balance between the frequency of emptying and the container size to ensure that the waste is managed effectively and efficiently.
While bowling with friends, Brandy rolls a strike in 2 out of 10 frames. What is the experimental probability that Brandy will roll a strike in the first frame of the next game? Enter your answer as a simplified fraction
The experimental probability of Brandy rolling a strike in the first frame of the next game is 1/5.
Given that Brandy rolls a strike in 2 out of 10 frames in a game, we can calculate the experimental probability of her rolling a strike in the first frame of the next game. Since there are 10 frames in a game, the probability of Brandy rolling a strike in any given frame is 2/10 or 1/5. Therefore, the experimental probability of her rolling a strike in the first frame of the next game is also 1/5. This is based on the assumption that her performance in each frame is independent of the others, and the probability remains constant from frame to frame.
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What is the meaning of beauty and completeness? In relation to these what are the attributes a Muslim should adopt?
ᴄᴏᴍᴘʟᴇᴛᴇɴᴇꜱꜱ ᴍᴇᴀɴꜱ ᴛʜᴇ ꜱᴛᴀᴛᴇ ᴏꜰ ʙᴇɪɴɢ ᴄᴏᴍᴘʟᴇᴛᴇ ᴀɴᴅ ᴇɴᴛɪʀᴇ; ʜᴀᴠɪɴɢ ᴇᴠᴇʀʏᴛʜɪɴɢ ᴛʜᴀᴛ ɪꜱ ɴᴇᴇᴅᴇᴅ.
ʙᴇᴀᴜᴛʏ ᴍᴇᴀɴꜱ combination of qualities, such as shape, colour, or form, that pleases the aesthetic senses, especially the sight.
Manual transmission has a driver-operated clutch and a movable gear selector. In manual transmission, the gears are engaged .....................
In the case above about manual transmission, the gears are engaged manually.
What is manual transmission?The Definition of the term manual transmission is regarded as a kind of a system where there is the changing gears in a manual way.
Hence, In the case above about manual transmission, the gears are engaged manually is correct.
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50 for brainliest HELP ASAP
absurd answers will be recorded
Answer:
1) This is because too much fuel is needed to get a payload from the surface to orbital altitude an accelerated to orbital speed.
2) This is because space travel present extreme environment that affect machines operations and survival.
Explanation:
Hope it helps
sen yapsana mk halla halla yaw
a circular array behaves
If we consider the first element to be the next of the last element, we have a circular array. Queues are implemented using circular arrays.
What is Array?
An array is a collection of numbers, pictures, or objects that are organized in to the rows and columns based on their type. An array is a set of items, or data, stashed in contiguous memory locations, also recognized as database systems, in coding and programming.
An array's purpose is to keep multiple pieces of data of the same type around each other. An array can be used to illustrate a mathematical property known as the commutative property of multiplication, that also shows that the order of the factors or elements could be changed into, while the product of these elements remains as constant.
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In your role, you are responsible for making sure that delivery trucks depart from the building on time. When a truck arrives late, the company must pay to upgrade the shipping method so the customer receives the order as expected. Prior to the trucks departure, you are responsible for completing a quality inspection to ensure none of the customer orders damaged. One day, you encounter a situation where a delivery will be late if you perform the quality inspection on the truck. What decision do you make and why?
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.
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
Look at the following statement. while (++x < 10) Which operator is used first? ++ Neither. The expression is invalid. O both ++ and < operators are used at the same time.
A "While" Loop is used to repeatedly execute a particular block of code until a condition is met.
The responses to the questions are listed below. The operation that determines whether the condition x 10 is true is assessed first because the operator is used first. The reason for this is that we use the post increment operator for x. As a result, x is first used for the operation we are performing before being raised by 1. According to semantics, the variable's value is increased by 1 by both prefix and postfix ++. The result of the operator is the NEW/CURRENT value stored in the variable if the ++ is placed before the variable (a prefix operator); the result of the operator is the value stored in the variable if the ++ is written after the variable (a postfix operator).
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Which of the numbers below correctly describes 17 mA?a. 0.17 mAb. 0.17 Ac. 0.0017 kAd. 17,000 µA
The correct option that describes 17mA is option D, 17,000µA.What is an ampere?An ampere is a basic International System unit (SI).
The amount of current that passes through a conductor in one second with a charge of one coulomb is referred to as an ampere. An ampere is also known as an amp.What is milliampere?A milliampere is a one-thousandth (1/1000) of an ampere. This unit is used to measure low current values, typically in electronic circuits and low-power devices.So, 17mA may be represented as 17 x 1000 µA= 17000 µA.How is the conversion of milliampere to microampere done?We know that 1mA= 1000µA; 17mA will be equal to 17*1000 µA= 17,000µA.This answer is the correct one that describes 17mA. It's crucial to know the correct unit when you're measuring current since it can have significant implications for the circuit's overall performance.
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Air is heated in a rigid tank from a pressure of 100 kPa to 500 kPa. Determine the boundary work for this process.
The boundary work for the heating of air in a rigid tank from a pressure of 100 kPa to 500 kPa can be calculated as follows:First, we need to assume that there is no change in the volume of the air in the tank, which implies that there is no expansion or contraction of the air.
Therefore, the work done on the air is equal to the change in pressure, which is given as ΔP = P₂ - P₁ = 500 kPa - 100 kPa = 400 kPa, since the volume remains constant. The boundary work done is then given asW = ΔP * Vwhere V is the volume of air in the tank.We know that the volume of the air in the tank remains constant, therefore V can be taken as a constant and we can say thatW = ΔP * V = 400 kPa * VSince we don't have any information about the volume of air in the tank, we cannot calculate the boundary work for this process.
However, we can say that the boundary work done is positive, since the pressure increases. The boundary work is the work done by the gas on its surroundings during an isobaric process, that is, when the pressure remains constant.
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Consider a regenerative gas-turbine power plant with two stages of compression and two stages of expansion. The overall pressure ratio of the cycle is 9. The air enters each stage of the compressor at 300 K and each stage of the turbine at 1200 K. Accounting for the variation of specific heats with temperature, determine the minimum mass flow rate of air needed to develop a net power output of 105 MW.
Answer: the minimum mass flow rate of air required to generate a power output of 105 MW is 238.2 kg/s
Explanation:
from the T-S diagram, we get the overall pressure ratio of the cycle is 9
Calculate the pressure ratio in each stage of compression and expansion. P1/P2 = P4/P3 = √9 = 3
P5/P6 = P7/P8 = √9 =3
get the properties of air from, "TABLE A-17 Ideal-gas properties of air", in the text book.
At temperature T1 =300K
Specific enthalpy of air h1 = 300.19 kJ/kg
Relative pressure pr1 = 1.3860
At temperature T5 = 1200 K
Specific enthalpy h5 = 1277.79 kJ/kg
Relative pressure pr5 = 238
Calculate the relative pressure at state 2
Pr2 = (P2/P1) Pr5
Pr2 =3 x 1.3860 = 4.158
get the two values of relative pressure between which the relative pressure at state 2 lies and take the corresponding values of specific enthalpy from, "TABLE A-17 Ideal-gas properties of air", in the text book.
Relative pressure pr = 4.153
The corresponding specific enthalpy h = 411.12 kJ/kg
Relative pressure pr = 4.522
The corresponding specific enthalpy h = 421.26 kJ/kg
Find the specific enthalpy of state 2 by the method of interpolation
(h2 - 411.12) / ( 421.26 - 411.12) =
(4.158 - 4.153) / (4.522 - 4.153 )
h2 - 411.12 = (421.26 - 411.12) ((4.158 - 4.153) / (4.522 - 4.153))
h2 - 411.12 = 0.137
h2 = 411.257kJ/kg
Calculate the relative pressure at state 6.
Pr6 = (P6/P5) Pr5
Pr6 = 1/3 x 238 = 79.33
Obtain the two values of relative pressure between which the relative pressure at state 6 lies and take the corresponding values of specific enthalpy from, "TABLE A-17 Ideal-gas properties of air", in the text book.
Relative pressure Pr = 75.29
The corresponding specific enthalpy h = 932.93 kJ/kg
Relative pressure pr = 82.05
The corresponding specific enthalpy h = 955.38 kJ/kg
Find the specific enthalpy of state 6 by the method of interpolation.
(h6 - 932.93) / ( 955.38 - 932.93) =
(79.33 - 75.29) / ( 82.05 - 75.29 )
(h6 - 932.93) = ( 955.38 - 932.93) ((79.33 - 75.29) / ( 82.05 - 75.29 )
h6 - 932.93 = 13.427
h6 = 946.357 kJ/kg
Calculate the total work input of the first and second stage compressors
(Wcomp)in = 2(h2 - h1 ) = 2( 411.257 - 300.19 )
= 222.134 kJ/kg
Calculate the total work output of the first and second stage turbines.
(Wturb)out = 2(h5 - h6) = 2( 1277.79 - 946.357 )
= 662.866 kJ/kg
Calculate the net work done
Wnet = (Wturb)out - (Wcomp)in
= 662.866 - 222.134
= 440.732 kJ/kg
Calculate the minimum mass flow rate of air required to generate a power output of 105 MW
W = m × Wnet
(105 x 10³) kW = m(440.732 kJ/kg)
m = (105 x 10³) / 440.732
m = 238.2 kg/s
therefore the minimum mass flow rate of air required to generate a power output of 105 MW is 238.2 kg/s
Macon Controls produces three different types of control units used to protect industrial equipment from overheating. Each of these units must be processed by a machine that Macon considers to be their process bottleneck. The plant operates on two 8-hour shifts, 5 days per week, 52 weeks per year. The table below provides the time standards at the bottleneck, lot sizes, and demand forecasts for the three units. Because of demand uncertainties, the operations manager obtained three demand forecasts (pessimistic, expected, and optimistic). The manager believes that a
30
percent capacity cushion is best.
LOADING...
Time Standard
Demand Forecast
Component
Processing
(hr/unit)
Setup
(hr/lot)
Lot Size
(units/lot)
Pessimistic
Expected
Optimistic
A
0.04
1.0
60
15,000
16,000
27,000
B
0.30
4.7
75
10,000
12,000
18,000
C
0.05
8.7
100
16,000
24,000
35,000
a. How many machines are required to meet minimum (Pessimistic) demand, expected demand, and maximum (Optimistic) demand? (Enter your responses rounded up to the next whole number.)
b. How many machines are required if the operations manager decides to double lot sizes?
c. If the operations manager has three machines and believes that the plant can reduce setup time by 20 percent through process improvement initiatives, does that plant have adequate capacity to meet all demand scenarios without increasing lot sizes?
To meet the demand for component A without increasing lot sizes, 192.86 machines are required, exceeding the available 3 machines.
a. Calculation of machines required for minimum (Pessimistic) demand:
For component A, Processing (hr/unit) = 0.04
Lot Size (units/lot) = 60
Total demand required for pessimistic forecast = 15,000 machines
For pessimistic forecast, the processing time required will be: 15,000 × 0.04 = 600 hours
Setup (hr/lot) = 1.0
For 30% capacity cushion, the total operating hours will be: (600 / (1 - 0.3)) = 857.1428571428571
For expected forecast, the processing time required will be: 16,000 × 0.04 = 640 hours
For 30% capacity cushion, the total operating hours will be: (640 / (1 - 0.3)) = 914.2857142857142
For optimistic forecast, the processing time required will be: 27,000 × 0.04 = 1080 hours
For 30% capacity cushion, the total operating hours will be: (1080 / (1 - 0.3)) = 1542.857142857143
Therefore, the machines required will be:
107.14 machines for pessimistic forecast
114.29 machines for expected forecast
192.86 machines for optimistic forecast
b. Calculation of machines required if the operations manager decides to double lot sizes:
Pessimistic forecast: 120 units/lot
Expected forecast: 150 units/lot
Optimistic forecast: 200 units/lot
The calculation of the total operating hours and machines required will be the same as in part a, with the respective lot sizes.
c. Calculation of the number of machines required with 20% reduced setup time:
New setup time for component A: 0.8 hours/lot
The calculation of the new processing hours and machines required will be the same as in part a, with the reduced setup time.
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Advantages top-down design
Answer:
The following are some advantages of a Top-down design approach:
1. Separating a problem into more smaller parts causes it to be far more simpler and easier to tackle and manage.
2. Top down design permits programmers or groups to work on a similar projects without getting in one another's way.
3. Every module of code to be tested independently.
4. Top-down plan permits the systems analyst to analyze the general organizational objectives first.
5. The top-down design likewise gives attractive accentuation on collaboration or the interfaces that systems and their subsystems require.
6. Top-down design allows system analyst to work in parallel on different sub-systems which can save a lot of time.
Explanation:
Most systems comprise of progressively more modest and more modest sub-systems.
Top down design is the name given to separating an issue into progressively smaller and more smaller sensible parts (otherwise called decomposition).
Develop rough sketches of ideas bridge
Answer:
look online
Explanation:
Consider the following PROLOG program. male (henry). male (tom). married (tom). bachelor (P) :- male (P), not (married (P)). What would it be the incorrect result of the following query? (A) ?- bachelor(henry). true (B) ?- bachelor(tom). false (C) ?- bachelor(Who). Who = henry; Who = joe; false (D) ?- married (X). X=tom OOO O O (A) (B) Ụ
Incorrect result: (C) ?- bachelor(Who). Who = henry; Who = joe; false. The Option C.
Why does the query bachelor(Who) produce an incorrect result?The query bachelor(Who) is expected to find all individuals who are male and not married, providing their names as solutions. However, the incorrect result is obtained in this case.
The correct part of the result, Who = henry, is consistent with the knowledge base, as Henry is declared as a male and is not married. However, the incorrect part of the result, Who = joe, is unexpected. There is no mention of Joe in the knowledge base, so the query should not yield him as a solution.
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