A room is initially at the outdoor temperature of 25°C. Now a large fan that consumes 200W of electricity when running is turned on. The heat transfer rate between the room and the outdoor air is given as Q = UA (Ti - To) where U = 6 W/m2 °C is the overall heat transfer coefficient, A = 30 m2 is the exposed surface area of the room, and Ti and To are the indoor and outdoor air temperatures, respectively. Determine the indoor air temperature when steady operating conditions are established
Answers
The indoor air temperature when steady operating conditions are established is 27.3 °C.
We can use the energy balance equation to solve for the indoor air temperature when steady operating conditions are established. The energy balance equation is:
Q = Qin - Qout + Qgen
where Q is the rate of heat transfer between the room and the outdoor air, Qin and Qout are the rates of heat transfer between the room and the inside and outside walls, respectively, and Qgen is the rate of heat generation due to the fan.
We can assume that the rate of heat transfer between the room and the inside wall is negligible since the room is initially at the outdoor temperature. Therefore, we have:
Q = -UA(Ti - To) + Qgen
Substituting the given values, we have:
Q = -6 × 30 × (Ti - 25) + 200
Simplifying, we get:
Ti - 25 = -1/36 (200 - 180Ti)
Solving for Ti, we get:
Ti = 27.3 °C
Therefore, the indoor air temperature when steady operating conditions are established is 27.3 °C.
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Related Questions
Conductivity is the reciprocal of what?
Answers
Considering the CIA triad and the Parkerian hexad, what are the advantages and disadvantages of each model?
Answers
The CIA triad and the Parkerian hex are the fundamental principles of information security.
CIA triad and the Parkerian hexadParkeriano, or Parkerian hexad: is a set of six elements of information security proposed by Donn B. Parker.
1. Confidentiality.
2. Ownership or Control.
3. Integrity.
4. Authenticity.
5. Availability.
6. Utility
The Parkerian hexagram adds three more attributes to the three classic security attributes of the CIA triangle
Confidentiality Integrity Availability
these are the fundamental principles of information security.
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To measure an object accurately, what point on the ruler would you align with the object edge
Answers
Answer:
Along the zero to measure an object on a ruler
Which of the following power tools has a revolving vertical shaft and a cutter? *
1 point
a) saber saw
b) router
c) miter saw
d) circular saw
Answers
The tool that has a revolving vertical shaft and a cutter is a router. The correct option is b.
What are power tools?There are many different kinds of power tools, including portable power tools like a circular saw, heat guns, and wall chasers as well as electrical power tools like impact wrenches, lathes, power drills, power ratchet sets, and power saws.
Power tools including circular saws, jigsaws, drills, hammer drills, sanders, grinders, routers, and many others reduce labor and time requirements. The requirement for knowledge of the risks that power tools provide if used improperly is raised due to their rising use.
A power tool called a router has a flat base and a spinning blade that protrudes beyond the base. An electric motor or a pneumatic motor can drive the spindle.
Therefore, the correct option is b) router.
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Using the following data, determine the percentage retained, cumulative percentage retained, and percent passing for each sieve.
Sieve size Weight retained (g) No. 4 59.5 No. 8 86.5 No. 16 138.0 No. 30 127.8 No. 50 97.0 No. 100 66.8 Pan 6.3
Answers
Solution :
Sieve Size (in) Weight retain(g)
3 1.62
2 2.17
\($1\frac{1}{2}$\) 3.62
\($\frac{3}{4}$\) 2.27
\($\frac{3}{8}$\) 1.38
PAN 0.21
Given :
Sieve weight % wt. retain % cumulative % finer
size retained wt. retain
No. 4 59.5 10.225% 10.225% 89.775%
No. 8 86.5 14.865% 25.090% 74.91%
No. 16 138 23.7154% 48.8054% 51.2%
No. 30 127.8 21.91% 70.7154% 29.2850%
No. 50 97 16.6695% 87.3849% 12.62%
No. 100 66.8 11.4796% 98.92% 1.08%
Pan 6.3 1.08% 100% 0%
581.9 gram
Effective size = percentage finer 10% (\($$D_{20}\))
0.149 mm, N 100, % finer 1.08
0.297, N 50 , % finer 12.62%
x , 10%
\($y-1.08 = \frac{12.62 - 1.08}{0.297 - 0.149}(x-0.149)$\)
\($(10-1.08) \times \frac{0.297 - 0.149}{12.62 - 1.08}+ 0.149=x$\)
x = 0.2634 mm
Effective size, \($D_{10} = 0.2643 \ mm$\)
Now, N 16 (1.19 mm) , 51.2%
N 8 (2.38 mm) , 74.91%
x, 60%
\($60-51.2 = \frac{74.91-51.2}{2.38-1.19}(x-1.19)$\)
x = 1.6317 mm
\($\therefore D_{60} = 1.6317 \ mm$\)
Uniformity co-efficient = \($\frac{D_{60}}{D_{10}}$\)
\($Cu= \frac{1.6317}{0.2643}$\)
Cu = 6.17
Now, fineness modulus = \($\frac{\Sigma \text{\ cumulative retain on all sieve }}{100}$\)
\($=\frac{\Sigma (10.225+25.09+48.8054+70.7165+87.39+98.92+100)}{100}$\)
= 4.41
which lies between No. 4 and No. 5 sieve [4.76 to 4.00]
So, fineness modulus = 4.38 mm
Using the formula XC=1/(2πfC) in your answer, how would a capacitor influence a simple DC series circuit?
Answers
The capacitive reactance of a DC series circuit increases when its capacitance decreases and vice-versa.
What is a DC series circuit?A DC series circuit can be defined as a type of circuit in which all of its resistive components are connected end to end, so as to form a single path for the flow of current.
This ultimately implies that, the same amount of current flows through a direct current (DC) series circuit.
The capacitive reactance of a DC series circuit.Mathematically, the capacitive reactance of a DC series circuit is given by this formula:
\(X_C = \frac{1}{2\pi fC}\)
Where:
is the capacitive reactance.f is the frequency.C is the capacitance.From the above formula, we can deduce that the capacitive reactance of a DC series circuit is inversely proportional to both frequency and capacitance. Thus, the capacitive reactance of a DC series circuit increases when its capacitance decreases and vice-versa.
In conclusion, a capacitor would influence a simple DC series circuit by blocking the flow of direct current (DC) through it.
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a) Complete the following methods description using the correct tense for the verb in brackets. (This student is using passive voice rather than any human agents at the request of the instructor.) Student Lab Report Identical tensile test procedures were performed on all test specimens. Each of the metal specimens ____1____ [have] an indentation near the center to ensure that the fracture point would occur in this region. Tension tests ____2____ [conduct] as follows. Two pieces of reflective tape ____3____ [place] approximately 1 inch apart in the center of the specimen where the indentation 4 [locate]. The width and the thickness of the specimen at this location _____5_____ [measure] using a Vernier caliper. Then the specimen _____6____ [secure] in the MTS Load Frame. A laser extensometer _____7_____ [place] into position to measure the deformation of the specimen. The laser extensometer ______8_ __ [use] to measure the original distance between the pieces of reflective tape. The MTS ________9____ [set] to elongate the specimen one tenth of an inch every minute.
Answers
Answer:
Each of the metal specimens HAS an indentation near the center to ensure that the fracture point would occur in this region. Tension tests WERE CONDUCTED as follows. Two pieces of reflective tape WERE PLACED approximately 1 inch apart in the center of the specimen where the indentation 4 WAS LOCATED. The width and the thickness of the specimen at this location WAS MEASURED using a Vernier caliper. Then the specimen WAS SECURED in the MTS Load Frame. A laser extensometer WAS PLACED into position to measure the deformation of the specimen. The laser extensometer WAS USED to measure the original distance between the pieces of reflective tape. The MTS WAS SET to elongate the specimen one tenth of an inch every minute.
What action does a release train engineer take prior to an upcoming program increment (pi) planning meeting?
Answers
Prior to an upcoming Program Increment (PI) planning meeting, a Release Train Engineer (RTE) takes several important actions. These actions include: 1. Preparing the agenda: The RTE is responsible for creating the agenda for the PI planning meeting.
This includes determining the topics to be discussed, setting the timeframes for each agenda item, and ensuring that all necessary stakeholders are included.
2. Coordinating with stakeholders: The RTE collaborates with various stakeholders, such as Product Managers, Product Owners, and Scrum Masters, to gather their inputs and align their expectations for the PI planning meeting. This ensures that all relevant parties are on the same page and have a shared understanding of the upcoming goals and priorities.
3. Communicating with the Agile Release Train (ART): The RTE communicates important information about the PI planning meeting to the ART, which consists of multiple Agile teams working towards a common goal. This involves providing updates on the meeting schedule, expectations, and any changes or adjustments that need to be made.
4. Preparing the PI objectives and metrics: The RTE works with the Product Managers and Product Owners to define the objectives and key performance indicators (KPIs) for the upcoming PI. These objectives and metrics help guide the planning process and ensure that the teams are aligned towards achieving the desired outcomes.
5. Facilitating the meeting: During the PI planning meeting, the RTE acts as the facilitator, ensuring that the meeting runs smoothly and all necessary discussions take place. They help to resolve conflicts, manage time, and ensure that the teams are focused on the goals and priorities defined for the PI.
By taking these actions, the Release Train Engineer helps to ensure a successful PI planning meeting, where the Agile teams can collaboratively plan and align their efforts for the upcoming Program Increment.
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FILL THE BLANK.
since thermocouples produce such low voltages, they are often connected in series. this connection is referred to as a(n) _____.
Answers
Thermocouples are temperature sensors that generate a voltage when there is a difference in temperature between two junctions. However, the voltage produced by one thermocouple is usually very small - typically only a few millivolts. To increase the output voltage, multiple thermocouples can be connected together in series.
This connection of multiple thermocouples in series is referred to as a "thermopile". A thermopile consists of several thermocouples connected in series, with each thermocouple adding its small voltage to the overall output voltage. The result is a higher voltage signal that is more easily measured by instruments or controllers.
The use of a thermopile has several advantages over using a single thermocouple. First, it provides a larger voltage signal, which makes it easier to measure accurately. Second, a thermopile can be more sensitive to changes in temperature than a single thermocouple. Finally, since a thermopile generates a higher voltage signal, it can be used over longer distances without suffering from signal degradation.
In summary, connecting thermocouples in series to form a thermopile is a common technique for increasing the voltage output of these temperature sensors. This method allows for more accurate and sensitive measurements, making it useful in a wide range of applications, including industrial process control, laboratory research, and environmental monitoring.
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The thermal resistance of a medium represents the resistance of that medium against heat transfer True or False
Answers
The given statement "The thermal resistance of a medium represents the resistance of that medium against heat transfer" is true. Further explanation is given below:
Thermal resistance, denoted as R, is a measure of the capacity of an element or a component to prevent heat flow. It is the difference between the temperature gradient across an object and the rate of heat energy transmission per unit area via that object. Thermal resistance, like electrical resistance, determines the efficiency of thermal energy transmission across a material.
The larger the thermal resistance, the more difficult it is to transfer heat through the material. As a result, the heat generated by a device's internal workings cannot be removed efficiently, causing it to overheat and ultimately fail. The SI unit of thermal resistance is the kelvin per watt, as in the case of electrical resistance. It is denoted by K/W. When selecting an insulating material, the thermal resistance of the material is critical.
A good insulator, such as air, has a high R-value, while a bad insulator, such as metal, has a low R-value. This is because metals are good heat conductors and so they have a low thermal resistance. Thus, it can be concluded that the given statement is true.
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You installed a new 40 gallon water heater with a 54,000 BTUh burner. The underground water temperature coming into the house is 55F
How long will it take to heat the water in the tank to a normal setting of 120F.
Please show setup and explanation.
Answers
Answer:
For most uses you'll want your water heated to 120 F(49 C) In this example you'd need a demand water heater that produces a temperature rise and it will take about 2 hours
the tensile strength of a unified fastener is measured in
Answers
The tensile strength of a unified fastener is typically measured in pounds per square inch (psi) or in newtons per square millimeter (N/mm²).
Tensile strength is a critical mechanical property that determines the maximum amount of pulling force a fastener can withstand before breaking or permanently deforming. It is an essential consideration in engineering and construction applications where high strength and resistance to pulling forces are required.
To measure tensile strength, fastener samples are subjected to a controlled tensile load until they fracture. The resulting force at the point of failure is then divided by the cross-sectional area of the fastener to determine its tensile strength, which is usually expressed in psi or N/mm².
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Integer dataSize is read from input. Then, strings and integers are read and stored into string vector colorList and integer vector quantityList, respectively. Lastly, string colorAsked is read from input.
Find the sum of the elements in quantityList where the corresponding element in colorList is equal to colorAsked.
For each element in colorList that is equal to colorAsked, output "Index " followed by the element's index. End with a newline.
Ex: If the input is:
3
lavender 25 lavender 22 gray 161
lavender
Then the output is:
Index 0
Index 1
Total: 47
#include
#include
using namespace std;
int main() {
int numElements;
string colorAsked;
int sumQuantity;
unsigned int i;
cin >> numElements;
vector colorList(numElements);
vector quantityList(numElements);
for (i = 0; i < colorList.size(); ++i) {
cin >> colorList.at(i);
cin >> quantityList.at(i);
}
cin >> colorAsked;
/*answer here*/
cout << "Total: " << sumQuantity << endl;
return 0;
}
Answers
Where the above condition is given, here's the solution:
#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main() {
int numElements, sumQuantity = 0;
string colorAsked;
unsigned int i;
cin >> numElements;
vector<string> colorList(numElements);
vector<int> quantityList(numElements);
for (i = 0; i < colorList.size(); ++i) {
cin >> colorList.at(i);
cin >> quantityList.at(i);
}
cin >> colorAsked;
for (i = 0; i < colorList.size(); ++i) {
if (colorList.at(i) == colorAsked) {
cout << "Index " << i << endl;
sumQuantity += quantityList.at(i);
}
}
cout << "Total: " << sumQuantity << endl;
return 0;
What is the explanation of the above code?
First, we declare an integer variable sumQuantity to keep track of the sum of quantities of elements in quantityList where the corresponding element in colorList is equal to colorAsked.We read the integer numElements from input.We declare two vectors colorList and quantityList with numElements elements each.We use a loop to read each string and integer from input and store them in colorList and quantityList, respectively.We read the string colorAsked from input.We use another loop to iterate through colorList and check if each element is equal to colorAsked. If it is, we output "Index " followed by the element's index and add the corresponding quantity from quantityList to sumQuantity.Finally, we output the total sum of quantities in sumQuantity.
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The salinity in the Dead Sea is 342 %o - it is so high that nothing but bacteria can live in it. What mass of salt would remain if I evaporate 2kg of seawater from there? A. 17.1g B. 68.4g
C. 171g D. 684g
Answers
Salinity percentage refers to the concentration of salt and other dissolved minerals in a body of water, typically expressed as a percentage of the total weight or volume of the water.
To calculate the mass of salt remaining after evaporating 2 kg of seawater from the Dead Sea, you need to use the given salinity percentage.
Step 1: Convert the salinity percentage to a decimal.
Salinity = 342‰ = 342/1000 = 0.342
Step 2: Multiply the mass of the seawater (2 kg) by the salinity decimal.
Mass of salt = 2 kg × 0.342 = 0.684 kg
Step 3: Convert the mass of salt to grams.
Mass of salt = 0.684 kg × 1000 g/kg = 684 g
Therefore, the mass of salt that would remain after evaporating 2 kg of seawater from the Dead Sea is 684 g, which corresponds to option D.
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Each of the following problems describes an algorithm implemented on a computer satisfying the axioms (13.5) and (13.7). For each one, state whether the algorithm is backward stable, stable but not backward stable, or unstable, and prove it or at least give a reasonably convincing argument. Be sure to follow the definitions as given in the text. (d) Data: x∈C. Solution: 0, computed as x⊖x. (Again, a real machine may do better than our definitions based on (13.7).) (e) Data: none. Solution: e, computed by summing ∑
k=0
[infinity]
1/k! from left to right using ⊗ and Θ, stopping when a summand is reached of magnitude <ϵ
machine
(f) Data: none. Solution: e, computed by the same algorithm as above except with the series summed from right to left. (g) Data: none. Solution: π, computed by doing an exhaustive search to find the smallest floating point number x in the interval [3,4] such that s(x)⊗ s(x
′
)≤0. Here s(x) is an algorithm that calculates sin(x) stably in the given interval, and x
′
denotes the next floating point number after x in the floating point system.
Answers
(d) The algorithm is backward stable.
(e) The algorithm is unstable.
(f) The algorithm is unstable.
(g) The algorithm is stable but not backward stable.
(d) The algorithm for computing 0 is backward stable because regardless of the input x, the computed solution x⊖x is always equal to 0. Any small perturbation in x will not affect the result.
(e) The algorithm for computing e by summing the series from left to right is unstable. It relies on accumulating small values of 1/k! until a summand with magnitude less than ϵ is reached. However, the accumulation of floating-point numbers can introduce rounding errors, and the order of summation can affect the result, leading to potentially large errors.
(f) The algorithm for computing e by summing the series from right to left is also unstable. The accumulation of floating-point numbers and the order of summation can introduce errors, resulting in potentially different results compared to the algorithm in (e).
(g) The algorithm for computing π using an exhaustive search is stable but not backward stable. It relies on finding the smallest floating-point number x in the interval [3,4] such that the product of sin(x) and sin(x') is less than or equal to 0. While the algorithm is stable in the sense that small perturbations in the input will not drastically change the result, it is not backward stable because the computed solution does not closely reflect the exact mathematical solution of π.
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a hallow steel tube 3.5m long has external diameter of 120mm. in order to determine the internal diameter the tube was subjected to a tensile load of 400KN and extension was measured to be 2 mm. if the modulus of elasticity for the tube material is 200 GPa. determine the internal diameter of the tube.
Answers
Answer:
Please check the photo (solve)
What is output?my_poem = 'Roses are red; Violets are blue'new_separator = '.'new_poem = my_poem.split(';')print(new_separator.join(new_poem))
Answers
Outputs the text "Roses are red; Violets are blue" to the variable "my poem"
A quantitative summary of an action is an output. For instance, the activity might be "we provide training" and the product might be "we trained 50 people to NVQ level 3". An output informs you that an activity has occurred. the quantity a person produces in a particular period of time. generator output is the power or energy produced or provided by a device or system. A quantity of commodities or services produced during a predetermined time period is called output. . The plural form will also be output in more generic, everyday circumstances. Nonetheless, the plural form can also be used in more particular settings.
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to be usable in an automotive electrical system, the ac output of the alternator must be ____ into dc.
Answers
To be usable in an automotive electrical system, the AC output of the alternator must be converted into DC.
This is typically accomplished by the use of a rectifier, which is a device that converts alternating current (AC) to direct current (DC). The rectifier allows the vehicle's electrical system to be powered by the DC output of the alternator, which is necessary for the operation of various components such as the battery, lights, ignition system, and other electrical accessories.
An automotive electrical system refers to the network of electrical components and wiring found in vehicles. It provides power and facilitates the operation of various systems and components in the vehicle, including the engine, lights, audio system, climate control, and more. Here are some key elements and components of an automotive electrical system:
Battery: The battery is the primary power source in a vehicle. It supplies electrical energy to start the engine and powers the vehicle's electrical systems when the engine is not runningAlternator: The alternator generates electricity and charges the battery while the engine is running. It ensures a steady supply of electrical power to the vehicle's electrical system and recharges the batteryStarter motor: The starter motor is responsible for cranking the engine and starting the combustion process. It draws electrical power from the battery to turn the engine's crankshaft until it starts running independentlyWiring and connectors: An intricate network of wires and connectors carries electrical current throughout the vehicle, connecting various components and systems. Wiring harnesses are used to organize and protect the wiresFuses and relays: Fuses are safety devices designed to protect the electrical system from overloading and short circuits. They contain a metal strip that melts and breaks the electrical circuit when excess current flows. Relays are electrically operated switches that control high-current circuits using low-current signalsIgnition system: The ignition system includes components like ignition coils, spark plugs, and ignition control modules. It generates the high-voltage electrical spark required to ignite the air-fuel mixture in the engine's cylindersLighting system: The lighting system encompasses headlights, taillights, turn signals, brake lights, interior lights, and other illumination components. These lights are powered by the electrical system and provide visibility and safetyElectronics and control modules: Modern vehicles incorporate numerous electronic systems and control modules to manage various functions. Examples include the engine control module (ECM), body control module (BCM), anti-lock braking system (ABS) module, and more.To know more about DC, visit the link : https://brainly.com/question/10715323
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Can someone help with this please?
Answers
Answer:
with what
Explanation:
c) Three AC voltages are as follows:
e1 = 80 sin ωt volts;
e2 = 60 sin (ωt + π/2) volts;
e3 = 100 sin (ωt – π/3) volts.
Find the resultant e of these three voltages and express it in the form
Em sin (ωt ± φ). [5 MARKS]
When this resultant voltage is applied to a circuit consisting of a 10-Ω resistor and a capacitance of 17.3 Ω reactance connected in series, find an expression for the instantaneous value of the current flowing, expressed in the same form. [4 MARKS]
Answers
Answer:
E = 132.69 sin(ωt -11.56)
i(t) = 6.64 sin (ωt +48.44) A
Explanation:
given data
e1 = 80 sin ωt volts 80 < 0
e2 = 60 sin (ωt + π/2) volts 60 < 90
e3 = 100 sin (ωt – π/3) volts 100 < -60
solution
resultant will be = e2 + e2 + e3
E = 80 < 0 + 60 < 90 + 100 < -60
\(\bar E\) = 80 + j60 + 50 - j50\(\sqrt{3}\)
\(\bar E\) = 130 + (-j26.60)
\(\bar E\) = 132.69 that is less than -11.56
so
E = 132.69 sin(ωt -11.56)
and
as we have given the impedance
z = (10-j17.3)Ω
z = 19.982 < -60
and
i(t) = \(\frac{132.69}{19.982}\) sin(ωt -11.56 + 60)
i(t) = 6.64 sin (ωt +48.44) A
Please solve this question by analytical method and by
constructing couple and force polygon
The Balancing of Rotor Masses equipment as demonstrated in the Mechanical Engineering Department in CIT is shown below in Fig Q2a. Initially there are five disks on a shaft which were demonstrated to
Answers
The Balancing of Rotor Masses equipment can be balanced through analytical methods and constructing couple and force polygons.
The analytical method involves calculating the unbalanced force and the position of the counterweights required to balance the system.
To construct the couple polygon, draw a line representing the axis of rotation and another line representing the unbalanced force. Draw a perpendicular line to the unbalanced force line to represent the distance between the axis of rotation and the unbalanced force. This line is the moment arm. Draw a vector on the moment arm line representing the unbalanced force. Draw another vector perpendicular to the unbalanced force vector, representing the magnitude of the counterweight required. The direction of this vector represents the location of the counterweight.
To construct the force polygon, draw a line representing the axis of rotation and another line representing the unbalanced force. Draw a perpendicular line to the unbalanced force line to represent the distance between the axis of rotation and the unbalanced force. This line is the moment arm. Draw a vector on the moment arm line representing the unbalanced force. Draw another vector on the axis of rotation line representing the magnitude and direction of the counterweight required to balance the system.
Using either method, the Balancing of Rotor Masses equipment can be balanced effectively, ensuring smooth operation and reducing wear and tear on the system.
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This might count as engineering, I'm not sure as this is IT
An ordered collection of data elements stored and accessed in a program is called what?
Group of answer choices
Variables
List
Locale
Parameters
Answers
Answer:
10.5
Explanation:
Convert to an equation for example P%* X=Y
P is 7.5% X is 140, so the equation Is 7.5 percent * 14= Y
convert 7.5% Into a decimal by removing the percent sign and deviding by 7.5/100= 0.075
Substitute 0.075 for 7.5% in the equation: 7.5%*140=Y becomes 0.075*140= 10.5
ou are given a dag. how would you check in linear time if the dag includes a hamiltonian path, i.e., a (directed) path that traverses every vertex exactly once? note 1: please provide a detailed description of your solution in plain english or in pseudocode. note 2: you are also allowed to use bfs and dfs as blackbox algorithms (you do not need to explain how it works if you use it) so long as you detail the inputs and outputs to the algorithms as well as any modifications you make.
Answers
This algorithm has an O(V+E) time complexity, where V is the number of graph vertices and E is the number of graph edges. This technique runs in polynomial time, which is substantially quicker than the exponential time needed for a thorough search of every conceivable path.
What is the DFS search time complexity for a network with V vertices and E edges?If the entire tree is traversed, the temporal complexity of DFS is O (V) O(V) O(V), where V is the number of nodes. Where V is the number of vertexes and E is the number of edges, the temporal complexity for a graph is O (V + E) O(V + E) O(V+E).
What does time complexity V and E mean?DFS has an O(V + E) time complexity, where V is the number of edges and E is the number of vertices. This is due to the algorithm's worst-case scenario, which involves exploring every vertex and edge exactly once.
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The company PureNSafe is designing a portable, solar-powered disinfection system for Army use only. The system is simply an inlet pipe, a pump, a mixing chamber and an outlet pipe. The water is continuously pumped into the chamber where it is irradiated with UV light before it exits through the the appropriate tube into a collection vessel. The disinfection rate constant rate of disinfection with UV light is 7.80 s.1 and the amount of bacteria has to be reduced by 99.9%. be reduced by 99.9%. Since the Army requires an object that can be carried in a backpack, it requires that the chamber of the apparatus must not hold a capacity greater than 2 L. How much water will the system be able to produce during 10 hours of sunshine?
Answers
Solution :
The treatment system will operate as the well mixed chamber.
Disinfection rate constant for the UV light, k is 7.80 /s. Number of bacteria in water need to be reduced by 99.9%
Percent reduction of bacteria should be \($(1-10^{0.99}) \times 100 =89.7\%$\)
Volume of the unit chamber is fixed at 2L
Assume the inlet concentration, \($C_0$\) as 1000
The outlet concentration of bacteria, C should be \($1000-\left(1000 \times \frac{89.7}{100}\right)$\)
= 103
The well mixed chamber will then follow a completely mixed flow reactor model.
Compute the time required :
\($t=\frac{1}{k}\left(\frac{C_0}{C}-1\right)$\)
\($t=\frac{1}{7.8}\left(\frac{1000}{103}-1\right)$\)
= 1.115 s
Flow through the system is \($\frac{2 \ L}{1.115 \ s}$\) = 1.79 L/s
The amount of water treated during the 10 hours of sunlight is 1.79 x 10 x 60 x 60 = 64440 L
the maximum available fire-resistant protection in underground buildings is typically ___ hours.
Answers
The maximum available fire-resistant protection in underground buildings is typically 3 hours.
What is an underground building?An underground building is a building that is mostly or entirely below ground level. Underground buildings serve various purposes, such as storage, protection, living, and working.
Additionally, underground buildings can also protect people from natural calamities, for example, tornadoes, hurricanes, earthquakes, and bomb explosions.
When we talk about fire-resistant protection in underground buildings, typically, the maximum available fire-resistant protection is 3 hours. A concrete structure with proper fire-resistant insulation can survive for at least three hours in case of a fire breakout.
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A slab-milling operation is performed on a 0.7 m long, 30 mm-wide cast-iron block with a feed of 0.25 mm/tooth and depth of cut of 3 mm. The cutter has a diameter of 75 mm, has 8 cutting teeth, and rotates at 200 rpm. Calculate the cutting time and material removal rate.
Answers
Answer:
a) \(T_m=1.787min\)
b) \(MRR=35259.7mm^3/min\)
Explanation:
From the question we are told that:
Cast-iron block Dimension:
Length\(l=0.7m=>700mm\)
Width \(w=30mm\)
Feed\(F=0.25mm/tooth\)
Depth \(dp=3mm\)
Diameter \(d=75mm\)
Number of cutting teeth \(n=8\)
Rotation speed \(N=200rpm\)
Generally the equation for Approach is mathematically given by
\(x=\sqrt{Dd-d^2}\)
\(X=\sqrt{75*3-3^2}\)
\(X=14.69mm\)
Therefore
Effective length is given as
\(L_e=Approach +object Length\)
\(L_e=700+14.69\)
\(L_e=714.69mm\)
a)
Generally the equation for Machine Time is mathematically given by
\(T_m=\frac{L_e}{F_m}\)
Where
\(F_m=F*n*N\)
\(F_m=0.25*8*200\)
\(F_m=400\)
Therefore
\(T_m=\frac{714.69}{400}\)
\(T_m=1.787min\)
b)
Generally the equation for Material Removal Rate. is mathematically given by
\(MRR=\frac{L*B*d}{t_m}\)
\(MRR=\frac{700*30*3}{1.787}\)
\(MRR=35259.7mm^3/min\)
measure of the probable hydraulic demand on the water supply by various types of plumbing fixtures?
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CODE
PUZZLE 92
B
C
M
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M
Fiil the square with numbers with albhabets
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Answer:
Explanation:
I'm not 100% this is what you want, but here it is:
2
3
13
8
11
A
13
Both forms of the rmf illustrate a(n) _______ engineering process as a way to plan, design, and build a complicated system.
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Both forms of the Risk Management Framework (RMF) illustrate a systems engineering process as a way to plan, design, and build a complicated system.
What is engineering?Engineering is a discipline and profession that involves the application of scientific, mathematical, and practical knowledge to design, develop, build, and improve various systems, structures, machines, processes, and technologies.
Engineers utilize their expertise to solve complex problems and create practical solutions that meet societal needs.
Engineers employ a systematic and analytical approach, combining creativity, technical skills, and scientific principles to tackle challenges across different fields.
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Prove that in a 2’s complement number system addition overflows if and only if the carry from the sign position does not equal the carry into the sign position. Consider the three cases: adding two positive numbers, adding two negative numbers, and adding two numbers of opposite sign.
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Consider the four sub-cases for each of those three cases two positives, two negatives, one of each . Show that some of those sub-cases are not possible in each case. Then examine each sub-case to see if it indicates overflow.
What is 2's complement system?Two's complement is a mathematical operation that converts a positive binary number with equivalent value reversibly into a negative binary number with equivalent value.
it occurs using the binary digit with the greatest place value to indicate whether the binary number is positive or negative.
Consider each of those three cases' four sub-cases. There are two positives and two negatives, with one of each.
Demonstrate that some of the sub-cases are not feasible in each case. Then, for each sub-case, determine whether it indicates overflow.
Thus, by this it can be proved that in a 2’s complement number system addition overflows if and only if the carry from the sign position does not equal the carry into the sign position.
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