(a) The full Energy Balance for this system in rate form:
\(\boxed {\frac{\text{ dm}}{\text {dt}} = (\text m_1 + \text m_2) - (\text m_3 + \text m_4)}\)
(b) The full Entropy Balance for this system in rate form:
\(\boxed {\frac{\text{ du}}{\text {dt}} = (\text m_1 \text h_1+ \text m_2 \text h_2 + \text Q_1 + \text Q_2) - (\text m_3\text h_3 + \text m_4\text h_4 + \text Q_3+ - \text W)}\)
What is Entropy Balance?
A technique for matching treatment and control observations that comes from Hainmueller is entropy balancing (2012). It creates a set of weights that are complementary and forces some balance metrics to hold by design.
Therefore, unlike coarsened exact matching, there is no need to iterate on a matching model by performing the match, assessing the balance, and experimenting with various parameters to enhance balance.
Entropy balancing, in contrast to coarsened exact matching, does not necessitate massive data sets or discard significant portions of the sample. A set of balance conditions must be given for entropy balancing to occur.
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genetic engineering is possible because the genetic code of all organisms is based on the same _______________. however, all attempts to genetically engineer new organisms are not successful.
Answer:
DNA
Explanation:
What makes an electronic instrument a synthesizer?
An electronic instrument is considered a synthesizer if it produces sound by generating or altering waveforms using electronic circuits or digital signal processing.
A synthesizer is an electronic musical instrument that can produce a wide range of sounds by generating and altering waveforms through various techniques. In essence, a synthesizer converts an electrical signal into sound. A synthesizer can produce sounds that mimic traditional acoustic instruments, such as pianos, guitars, and strings, as well as generate entirely new sounds that cannot be produced by traditional instruments.
The following are some of the characteristics that set synthesizers apart from other electronic instruments:
Waveform Generation: Synthesizers can generate a wide range of waveforms, including sine, square, sawtooth, and triangle waves. The type of waveform used determines the nature of the sound produced.Sound Manipulation: Synthesizers can alter the sound in various ways by using filters, envelopes, modulation, and effects.Polyphony: Synthesizers can produce multiple notes or sounds simultaneously.Programmability: Synthesizers can be programmed to store and recall specific sounds or settings. This allows for the creation of complex and unique sounds.Interface: Synthesizers often have a keyboard or other interface that allows for the control of various parameters, such as pitch, volume, and modulation.Learn more about electronic instrument:
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If the tension in the gantry-crane hoisting cable is T = 14 kN , determine the scalar components of T .
The expressions Tx = T cos() and Ty = T sin(), respectively, are used to denote T's scalar components in the horizontal and vertical directions.
What is the scalar value of the Y component of the vector?
The scalar x-component of a vector can be calculated using the cosine and sine of the vector's direction angle, and the scalar y-component can be calculated using the magnitude and cosine of the vector's direction angle.
Sin or Cos is greater, which is it?
As a result, the sine function is used to calculate the x-component and the cosine function to calculate the y-component.
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Here, Y=9;Z=9 ME 3203 Assignment The last Two digits of your roll number YZ The last Two digits of your roll number YZ If you are then switch between R1 and R4 Location of all strain gauges Modulus of elasticity of R2 R1 Modulus of elasticity of Pa. The proportionality constant (G) of your average diameter of the beam is 10 cm. You have connected your strain gauge and resistors with a wheatstone bridge. 1. Draw the circuit of your wheatstone bridge. You have supplied the wheatstone bridge with 10V. 2. What is the output voltage across the intermediate junctions when no load was 3. What is the outp applied?
1. Wheatstone bridge circuit:
Here, R1 is the variable resistor and R2, R3 and R4 are fixed resistors.
2. Output voltage when no load is applied:
When no load is applied, the strain gauge will be at its original size and no change in resistance will be observed.
Therefore, the output voltage across the intermediate junctions of the Wheatstone bridge will be zero.
3. Output voltage when load is applied:
When a load is applied, the strain gauge will experience a change in resistance due to the deformation.
This change in resistance will cause an unbalance in the Wheatstone bridge, resulting in a non-zero output voltage across the intermediate junctions.
To calculate the output voltage, the Wheatstone bridge equation can be used:
Vout = (G * (R2/R1)) * (Vsupply / 2)Where,Vout = Output voltage across the intermediate junctions
G = Proportionality constant (G = 10 cm)
R1 = Resistance of the variable resistor (strain gauge)
R2 = Resistance of the fixed resistor (10 kΩ)
VS = Supply voltage (10 V)
Substituting the values given in the question,
Vout = (10 * (10/9000)) * (10/2)
Vout = 0.0556 V
Therefore, the output voltage across the intermediate junctions when load is applied is 0.0556 V.
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A 4-pole, 3-phase induction motor operates from a supply whose frequency is 60 Hz. calculate: 1- the speed at which the magnetic field of the stator is rotating. 2- the speed of the rotor when the slip is 0.05. 3- the frequency of the rotor currents when the slip is 0.04. 4- the frequency of the rotor currents at standstill.
Answer:
The answer is below
Explanation:
1) The synchronous speed of an induction motor is the speed of the magnetic field of the stator. It is given by:
\(n_s=\frac{120f_s}{p}\\ Where\ p\ is \ the \ number\ of\ machine\ pole, f_s\ is\ the\ supply \ frequency\\and\ n_s\ is \ the \ synchronous\ speed(speed \ of\ stator\ magnetic \ field)\\Given: f_s=60\ Hz, p=4. Therefore\\\\n_s=\frac{120*60}{4}=1800\ rpm\)
2) The speed of the rotor is the motor speed. The slip is given by:
\(Slip=\frac{n_s-n_m}{n_s}. \\ n_m\ is\ the \ motor\ speed(rotor\ speed)\\Slip = 0.05, n_s= 1800\ rpm\\ \\0.05=\frac{1800-n_m}{1800}\\\\ 1800-n_m=90\\\\n_m=1800-90=1710\ rpm\)
3) The frequency of the rotor is given as:
\(f_r=slip*f_s\\f_r=0.04*60=2.4\ Hz\)
4) At standstill, the speed of the motor is 0, therefore the slip is 1.
The frequency of the rotor is given as:
\(f_r=slip*f_s\\f_r=1*60=60\ Hz\)
Refrigerant-134a at 1 MPa and 100 C is to be cooled to 1 MPa and 28 C in a condenser by air. The air enters at 125 kPa and 25 C with a mass flow rate of 697 kg/min and leaves at 97 kPa and 58 C. Determine the mass flow rate of the refrigerant. Assume air has a constant heat capacity determined at room temperature. Report the mass flow rate of the refrigerant in kg/min with one decimal digit, for example 95.3 or 105.6.
Assignment: Explain any three
ways that research can facilitate
the work of building technicians.
The three ways that research can facilitate the work of building technicians is that:
They will know the timeframe to start and complete the buildingThey will know the type and right materials to use.It will help them in the area of budgeting of equipment, tools and building materials needed.What do building technicians do?Building technicians are known to be people who help with some tasks around construction projects and building works.
Note that building technician overseeing a scope of tasks such as monitoring build progress and as such The three ways that research can facilitate the work of building technicians is that:
They will know the timeframe to start and complete the buildingThey will know the type and right materials to use.It will help them in the area of budgeting of equipment, tools and building materials needed.Learn more about technicians from
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Moving either throttle past 85% N2 cable pos will do what to speed brakes
When moving either throttle past the 85% N2 cable position, the speed brakes will automatically retract.
This is because increasing the throttle to such a high level indicates the need for more power and acceleration, and having the speed brakes deployed would counteract this by creating drag and slowing the aircraft down. Retracting the speed brakes allows for a smoother and more efficient increase in speed.
The reason the speed brakes automatically retract when the throttle is moved past the 85% N2 cable position is because this is typically the point at which an aircraft is transitioning from climb to cruise.
During the climb, the speed brakes are often extended to help control the speed of the aircraft and maintain a safe climb rate. However, as the aircraft approaches cruise altitude, the engines need to produce more power to maintain the desired speed and altitude. Moving the throttle past the 85% N2 cable position increases the engine power, which can lead to a rapid increase in speed if the speed brakes are still extended. Therefore, the speed brakes are automatically retracted to prevent an overspeed condition and ensure the safe operation of the aircraft.
It's worth noting that this specific behavior may vary depending on the type of aircraft and its design. However, in general, the speed brakes are designed to be used during certain phases of flight and are automatically retracted when no longer needed to prevent unintended consequences.
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You are about to perform PMCS on your M1114? What resource should you use for the procedures and instructions for performing PMCS?
The resources and instructions that should be used for the procedures of performing PMCS are:
Operator's manualsSafety cautions and warnings.Fording kitHeating and cooling systems.What is PMCS?PMCS is an acronym for preventive maintenance checks and services and it can be defined as the maintenance, checks, and services that are typically performed before, during, and after the use of any type of military equipment such as:
M1114M1151M1123Basically, the resources and instructions that should be used for the procedures of performing PMCS are:
Operator's manualsSafety cautions and warnings.Fording kitHeating and cooling systems.Read more on PMCS here: https://brainly.com/question/15720250
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Question 40 and the next Question 41
Answer:
there's no photo? but I'm willing to help
Explain why it is important to model the context of a system that is being developed. Give two examples of possible errors that could arise if software engineers do not understand the system context.
Answer:
Explanation:
System models are created and used in order for all of the individuals involved in the process to be able to see exactly how each module that is being created connects to the rest of the system. This allows every developer to understand each module's/part's function and develop it with the entire system in mind. This also makes it easier to implement newer features. If a model is not made then the developers may miss key features and when it is time to piece all of the components of the system together, the overall process can become a jumbled mess.
Which of the following best describes empathy?
the understanding of the feelings and beliefs of others
the lack of pride or boastfulness
the courage to speak up with one’s ideas
the possession of honesty and high morals
Answer:
the first one is the correct answer
Answer:
the first one would be correct
Explanation:
What is the purpose of a gusset or gusset plate used in the construction and repair of aircraft structures?
Answer:
To join and reinforce intersecting structural members
Explanation:
The purpose of a gusset or gusset plate used in the construction and repair of aircraft structures is to join and reinforce intersecting structural members
Which option best describes a way engineers can provide maintenance, diagnoses, upgrades, or duplicates even for products they didn't design?
Answer:
Reverse Engineering
Explanation:
Just took the test
What do you notice about the speed of the water at different points along the pipe? When is the water the fastest? The slowest?
The speed of water in a pipe can vary depending on the shape and size of the pipe and the rate of flow of water.
The speed of water in a pipeGenerally, the speed of water is highest at the narrowest point of the pipe and lowest at the widest point.
In a pipe with a constant diameter, the speed of water is fastest at the center of the pipe and slowest at the edges. This is because the water experiences the least amount of friction and resistance at the center, where it is farthest away from the walls of the pipe.
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When water is run through a pipe that is narrow is flows faster than when the pipe is wider. This is called the Bernoulli's principle.
What is Bernoulli's principle?Bernoulli's principle asserts that in a horizontal flow of fluid, places with faster fluid speed will have less pressure than points of slower fluid speed.
When a vehicle goes quickly, it creates a low pressure area, and dusts are drawn along in the low pressure area. When we stand very close to the railway track on the platform and a fast train passes us, we are dragged towards the track due to the low pressure region created by the train's high speed.
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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
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. Used ____________ must be hot drained for 12 hours or crushed before disposal. A) Wet mops B) Sponges C) Oil filters D) Oily towels
Answer:
C - oil filters.
Explanation:
You must crush or drain oil filters for a minimum of 12 hours for recycling because used motor oil is hazardous waste and can affect the environment if disposed of properly so the government has created strict rules for proper disposal.
What should you do before you start welding?
Explanation:
1. Weld only in authorized areas. Make sure the area is dry, chemical free, and well ventilated.
2. Inspect the equipment before starting to use it.
3. Keep other people away, unless they are authorized to be there and are wearing the appropriate personal protective equipment.
It's okay to lift a short-wheelbase vehicle by the leaf springs or spring hangers.
Answer:
Not a good idea.
Explanation:
You don't want the vehicle moving while it's on a lift, so do not lift it up on a moving part.
50 POINTS!!! The goal of __?__ is to broaden our knowledge base.
The goal of __?__is to design a solution to a problem.
The goal of a plan is to broaden our knowledge base.
The goal of problem-solving is to design a solution to a problem.
Find the average of two numbers given by the user.
What the question wants is to write a code that would find and display the average of two numbers given by a user.
The code or program has been written and has been given below in C + +
The Program#include <iostream>
using namespace std;
int main() {
int a, b, sum;
double avg;
cout << "Enter the first integer number: ";
cin >> a;
cout << "Enter the second integer number: ";
cin >> b;
sum = a + b;
avg = (double)sum / 2;
cout << "\nThe average of your numbers is: " << avg << "\n";
return 0;
}
The Output:Enter the first integer number: 2
Enter the second integer number: 4
The average of your numbers is: 3
A simple explanation of the code is that it makes use of mathematical operators to perform the calculations by first adding up the numbers and then finding the average of the two numbers by dividing the sum of the numbers with two which is the number of elements.
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What simple changes would you make to a basic PID controller if you expected the sensors to be very noisy and the target to change by large steps?
Answer:
tuning the value of Ki termincreasing/changing the Kp termExplanation:
The simple change that would be made to a basic PID controller to prevent it from been noisy is tuning the value of Ki term while
The simple change that would be made to a PID controller if you want to change the target by large steps is increasing/changing the Kp term associated with the PID controller
Pls help!!! will give brainly!!!
Bridge collapses have hit the news recently with more frequency. Do some research online and state two possible reasons for these collapses. How might those employed in the Health, Safety, & Environmental Management pathway help prevent these collapses and keep us safe?
Answer:
The main reason for bridges collapses is: earthquakes (natural disasters) and construction incidents. Whenever a natural disaster occur, it makes the bridge collapse. An example is hurricanes. Hurricanes come with a great wind and that might lead to the bridge collapsing. Construction incidents means the bridge falls during construction. Those who are employed in health, safety and environmental management need to make sure that during the construction, they have examined the material and made sure it is strong. Working with economists, they should seek better understanding of the methods for minimizing the costs during the life of the bridge. In case for natural disasters, like flooding, they should make the bridge in a lever where the water won't reach the bridge. And they should have a limit for weight in the bridges because that is another reason it collapses, because the bridge does not support extra weight.
Explanation:
hope this helps
The hazard communication standard requires employers to do all of the following,except
Answer: All the options given regarding the hazard communication standard are correct except option D "prepare and post a list of employees who handle hazardous and toxic substances in the workplace".
The main requirements of employers that use hazardous chemicals are:
• ensure that chemicals are properly labelled.
• provide safety data sheets.
• train employees.
• create a written hazard communication program.
It should be noted that preparing and posting a list of employees who handle hazardous and toxic substances in the workplace is incorrect.
Therefore, the correct option is D.
Explanation: YW!!! please mark branlest! =^.^=
What is the approximate bandwidth of a 13-WPM International Morse Code transmission? a. 13 Hz; b. 26 Hz; c. 52 Hz; d. 104 Hz.
The bandwidth of a signal is the range of frequencies occupied by that signal.
The approximate bandwidth of a 13-word-per-minute (WPM) Morse code transmission is about 26 Hz. This is because Morse code signals typically have a keying rate of about 5 Hz per word, which means that a 13 WPM transmission would have a keying rate of about 65 Hz. However, Morse code signals also contain harmonics and sidebands that extend above and below the fundamental frequency, so the actual bandwidth of a 13 WPM Morse code transmission is typically around twice the keying rate, or about 26 Hz. Therefore, the correct answer is b. 26 Hz.
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2. The moist weight of 0.1 ft3 of soil is 12.2 lb. If the moisture content is 12% and the specific gravity of soil solids is 2.72, determine the following: a) dry unit weight, b) void ratio, c) porosity, d) degree of saturation, and e) volume occupied by water.
The answers to dry unit weight, void ratio, porosity, degree of saturation, volume occupied by water are respectively;
γ_d = 108.93 lb/ft³; e = 0.56; n = 0.36; S = 0.58; V_w = 0.021 ft³
Calculation of Volume and Weight of soil
We are given;
Moist weight; W = 12.2 lb
Volume of moist soil; V = 0.1 ft³
moisture content; w = 12% = 0.12
Specific gravity of soil solids; G_s = 2.72
A) Formula for dry unit weight is;
γ_d = γ/(1 + w)
where γ_w is moist unit weight as;
γ_w = W/V
γ_w = 122/0.1 = 122 lb/ft³
Thus;
γ_d = 122/(1 + 0.12)
γ_d = 108.93 lb/ft³
B) Formula for void ratio is;
e = [(G_s * γ_w)/γ_d] - 1
e = [(2.72 * 122)/108.93] - 1
e = 0.56
C) Formula for porosity is;
n = e/(1 + e)
n = 0.56/(1 + 0.56)
n = 0.36
D) Formula for degree of saturation is;
S = (w * G_s)/e
S = (0.12 * 2.72)/0.56
S = 0.58
E) Volume occupied by water is gotten from;
V_w = S*V_v
where;
V_v is volume of voids = nV
V_v = 0.36*0.1
V_v = 0.036 ft³
Thus;
V_w = 0.58 * 0.036
V_w = 0.021 ft³
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A pipe 120 mm diameter carries water with a head of 3 m. the pipe descends 12 m in altitude and reduces to 80 mm diameter, the pressure head at this point is 13 m. Determine the velocity in the small pipe and the rate of discharge (in L/s)? Take the density is 1000 kg/m³.
the most perfect method of scavenging??
The "most perfect" method of scavenging will depend on the specific materials or resources being scavenged, as well as the context in which the scavenging is occurring.
What is scavenging?Scavenging refers to the process of collecting and using materials or resources that have been discarded or abandoned by others.
Therefore, In knowing what you're looking for: Before you start scavenging, it's important to have a clear idea of the materials or resources you need and where you might be able to find them. This will help you focus your search and make it more efficient.
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Which option identifies the tool best to use in the following scenario?
Theresa has just purchased a crib and needs to assemble it quickly. The crib came with instructions, but no tools, and she does not know what she needs. On all of the screws in her kit, there is a six-sided hole in the head.
an Allen wrench
a Phillips screwdriver
a flathead screwdriver
an adjustable crescent wrench
NEXT QUESTION
Answer:
an Allen wrench
Explanation:
it is hexagonal
Bi servers use ________ to determine what results to send to which users and on which schedule.
Bi servers use matadata to determine what results to send to which users and on which schedule.
Metadata, also known as data that describes other data, is organized reference material that aids in classifying and identifying characteristics of the data it describes. John W. Warren refers to metadata as "both a cosmos and DNA" in Zen and the Art of Metadata Maintenance.
In most applications of information technology, the prefix "meta" denotes "an underlying definition or description." Basic data information is summarized in metadata, which can make it simpler to locate, utilize, and reuse specific instances of data.
Simple document file metadata includes things like author, date created, date edited, and file size. Finding a given document is made considerably simpler when one has the option to search for a specific aspect (or elements) of that metadata.
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