A 12-stage photomultiplier tube (PMT) has 12 dynodes equally spaced by 5 mm and subjected to the same potential difference. Under a working voltage of Vo, the response time of the photodetector is 18 ns and the dark current is 1.0 nA. The external quantum efficiency EQE of the photocathode in the PMT is 92% and the secondary emission ratio 8 of the dynodes follows the expression 8 = AV", where A = 0.5 and E=0.6. (a) Describe the working principle of the PMT. (4 marks) (b) Give the relationship between the working voltage Vo and the response time of the PMT and determine the value of Vo. (4 marks) (c) Calculate the gain of the PMT. (4 marks) (d) Explain whether the PMT can detect single photon per second. (3 marks)

Answer:

7.615 kW

Explanation:

Solution in pen paper form in the attachment section

Answer:

10 cents/kwh

Explanation:

Base monthly charge = $10.00

First 100 kwh at $0.16/kwh = $16.00

Next 200 kwh at $0.10/kwh = $20.00

Remaining 400 kwh at $0.06/kwh = $24.00

Total charge = $10 + $16 + $20 + $24 /(100+200+400)

Average cost = $70/700 or 10 cents/kwh

Answer:

Wireless

Explanation:

A wireless remote control can be an advantage to an operator who is welding close to the power source. Hence, option A is correct.

An electrical device used to wirelessly and remotely operate another device is a remote control, often known as a remote or clicker. Consumer gadgets, such as television sets, DVD players, and other home appliances, can be controlled by a remote control.

In the current electronic market, remote control systems fall into three primary categories: IR-based systems, RD-based systems, and BT-based systems. the receiver and the remote must be lined up exactly for infrared, also known as IR.

IR, on the other hand, is unable to pass through a number of materials but can operate over a much wider spectrum. This allows the user far greater freedom and control in environments with challenging terrain and obstacles.

Thus, option A is correct.

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Answer:

ABCDEFGHIJKLMNOPQRSTUVWXYZ

Answer:A

Explanation:

Those who want to save money and will use the product for only a few years

Answer:

THE ANSWER is A - those who want to save money and will use the product for only a few years

Explanation: Got it right on edg 2021

a. Yes, there is an appreciable voltage difference between the two ends of the 735 kV transmission line. Voltage drop across the line depends on the line's resistance, reactance, and transmitted power.

For a 745-mile-long line transmitting 800 MW, the voltage drop will be significant due to resistive and reactive losses.

b. Yes, there is an appreciable phase angle between corresponding line-to-neutral voltages.

This phase shift is caused by the line's inductance and capacitance, which lead to a lag or lead in voltage across the transmission line. The longer the line, the more significant the phase angle difference.

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Answer:

Explanation:

In satellite communications, downlink is the establishment of a communications link from an orbiting satellite down to one or more ground stations on Earth. Contrast with uplink.

The correct answer is DDR4 -DDR3 two different dimm technologies below can be used in a quad channel configuration.

A DIMM is a module that has one or more RAM chips mounted on a tiny circuit board with connections that link it to the motherboard of the computer. Each data bit is kept in a distinct memory cell by the DIMM. Since personal computer processors have a 64-bit data width, DIMMs employ a 64-bit data route. Physically, PCIe slots can be configured as x1, x4, x8, or x16. The vast majority of GPUs require PCIe x16 to function at their peak performance, making it the most often used configuration. A PCIe slot has two parts: mechanical (cards) and electrical (lanes).

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Answer: DDR3 & DDR4

Explanation:

To determine the net power produced by the gas turbine power station, we need to calculate the work done by the turbine and the work done by the compressor. The net power produced is the difference between these two values.

The simple Brighton cycle consists of four processes:

Isentropic compression in the compressor.

Constant pressure heat addition in the combustion chamber.

Isentropic expansion in the turbine.

Constant pressure heat rejection to the surrounding environment.

Given data:

Inlet conditions:

Pressure at turbine inlet (P1) = 1 MPa

Temperature at turbine inlet (T1) = 1000 K

Exit conditions:

Pressure at turbine exit (P2) = 125 kPa

Temperature at turbine exit (T2) = 600 K

Heat expelled to the surrounding environment (Q_out) = 7922 kJ/s

Mass flow rate of air (m_dot) = 2.5 kg/s

First, let's calculate the specific enthalpy at state 1 (h1) using the air properties at the given temperature and pressure. You can refer to the air tables for this purpose.

Next, we need to calculate the specific enthalpy at state 2 (h2). We can use the temperature and pressure at state 2 and the air properties tables to determine h2.

Now, we can calculate the work done by the turbine (W_turbine) using the equation:

W_turbine = m_dot * (h1 - h2)

Since the compressor is assumed to be an isentropic process, the work done by the compressor (W_compressor) can be determined using the isentropic efficiency of the compressor (η_compressor) and the enthalpy difference between states 1 and 2:

W_compressor = (h2s - h1) / η_compressor

Where h2s is the specific enthalpy at state 2s, which can be determined using the temperature and pressure at state 2 and the air properties tables.

Finally, the net power produced (P_net) is given by:

P_net = W_turbine - W_compressor

Calculate the values using the above steps, and you will find the net power produced by the gas turbine power station.

As a fire investigator, it is essential to have a strong understanding of the fire investigation process and be able to evaluate and analyze data effectively. One critical tool used in this process is knowledge filters. Knowledge filters are used to sort through and evaluate the information gathered during the investigation.

These filters can include things like experience, education, and training, and they help to identify critical pieces of information needed to determine the cause and origin of the fire.

When evaluating the information collected, it is essential to use knowledge filters to determine which pieces of data are relevant to the investigation. For example, an investigator may filter through witness statements to identify any inconsistencies or information that does not align with physical evidence. This process helps to identify the key facts of the investigation and eliminate any irrelevant data.

Overall, knowledge filters are an essential tool for fire investigators. They help to ensure that the investigation is thorough, accurate, and ultimately, lead to an accurate determination of the cause and origin of the fire.

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Answer:

to claim your answer $2 Approach www.gotit-pro.com

Explanation:

the picture is blank for me what does it say i can comment the answer plz mark brainlyist

Using the knowledge in computational language in C++ it is possible to write the code being write a class having two private variables

#include <iostream>

using namespace std;

class Rectangle { /*create a class named Rectangle*/

  private:

  float l,b; /*this class has two private variables l and b*/

  public:

  float getArea(float l, float b) /*this class has one member-function getArea which returns the area of the rectangle*/

  {

   return l*b; /*return the area of the rectangle*/

  }

};

int main () { /*the main function to check the working of our Rectangle class*/

 float l,b;

 Rectangle r1; /*create an object r1 of Rectangle class*/

 cout<<"Enter the length of the rectangle: ";

 cin>>l; /*input the length of the rectangle from the user*/

 cout<<"Enter the breadth of the rectangle: ";

 cin>>b; /*input the breadth of the rectangle from the user*/

 cout <<"Area of the rectangle is: "<< r1.getArea(l,b)<<" square units."; /*find the area of the rectangle using the member function of the class*/

 return 0;

}

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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

Answer:

it would affect the distance the antiantibodies diffuse from the disk

Explanation:

Answer: hello some data related to your question is missing attached below is the missing data

answer:

T2 = 265°C

Explanation:

First step : calculate sum of vertical forces

∑ y = 0

Fmg - 2(0.5 Fst ) = 0

∴Fmg = ( 12 * 10^6 ) ( 2 * π/4 (0.01)^2 )

          = 1884.96 N

Also determine the Compatibility equation in order to determine the change in Temperature

ΔT = 250°C

therefore Temperature at which average normal stress becomes 12.0 MPa

ΔT = T2 - T1

250°C = T2 - 15°C

T2 = 250 + 15 = 265°C

attached below is the detailed solution

Answer:

Mach number = 0.68168

The flow should be treated as compressible.

Explanation:

Given that:

The altitude of a commercial jet = 35000

The properties of air at that given altitude are as follows:

Pressure = 24.577 kPa

Temperature T = 50.78176° C

Temperature T = ( 50.78176 + 273 )K = 328.78176 K

\(\varphi = 0.38428 \ kg/m^3\)

The velocity is also given as: 550 mph = 245.872 m/s

Therefore, the sonic velocity is firstly determined by using the formula:

\(a = \sqrt{ \vartheta \times R \times T\\)

\(a = \sqrt{1.4 \times 287 \times 323.78176\)

\(a = \sqrt{130095.5112\)

a = 360.68755 m/s

Then, we can calculate the Mach number by using the expression:

\({Mach \ number = \dfrac{V}{a}}\)

\(Mach \ number = \dfrac{245.872}{360.68755}\)

Mach number = 0.68168

b) Ideally, all flows are compressible because the Mach number is greater than 0.3, suppose the Mach number is lesser than 0.3, then it is incompressible.

It is to be noted that all UHRS platforms are optimized for the popular kinds of internet browser applications.

The Universal Human Relevance System (UHRS) is a crowdsourcing platform that allows for data labeling for a variety of AI application situations.

Vendor partners link people referred to as "judges" to offer data labeling at scale for us. All UHRS judges are bound by an NDA, ensuring that data is kept protected.

A browser is a software tool that allows you to see and interact with all of the knowledgeon the World Wide Web. Web sites, movies, and photos are all examples of this.

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The entity declaration includes the name of the entity and a set of port declaration. So declaration that includes the name of ports and direction of flow through the ports by (in, out or inout).

A "black box" is an apparatus, system, or piece of equipment used in research, computer, or engineering that generates meaningful data while concealing any details of its internal operations. Its conclusions' justifications are still "black," or ambiguous. Unable to be understood internally, a black box system can only be understood in terms of its inputs and outputs.

With the traditional "black box test," approach only the stimulus/response behavior will be taken into account when analyzing an open system in order to infer the (unknown) box. In the given diagram, there are no outs for ports B as all are written in before std-logic. Meanwhile, in port a, the same goes but there are 5 inputs and 3 outputs. Not 6 as bun_b_bun_c is treated as one input, not two. The black-box diagrams that are defined by the following vhdl entity are attached below:

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There is no stress in the longitudinal direction since the pipe has no open ends.

What is longitudinal stress?

The tension that results from subjecting a pipe to internal pressure is known as longitudinal stress. A pipe's longitudinal stress acts in the direction of the pipe's length because it is parallel to the longitudinal axis of the pipe's centerline axis.

Tensile stress and compressive stress are two further subtypes of longitudinal stress. Tensile tension is the term for a type of stress that causes a body to grow longer.

Open ended pipe -longitudinal stress:

As we know if there are open ends there won't be any longitudinal stress

Hence, we can conclude that open pipes have no longitudinal stress

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The number of threads in 16 inches of the rod is 176 threads

Given that:

1 threaded rod= 11 threads per inch

Therefore, to find the number of threads in 16 inches of the rod,

We would have to multiply and this is given below:

16 * 11= 176 threads

This answer is gotten because a threaded rod has 11 threads per inch and when there are 16 inches of rod, to find the number of inches, you would have to multiply the values together.

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Answer:

Q1 true

Q2 true

And other I am confuse

Proper, smooth shifting is important because shifting before your vehicle is ready will cause it to je-rk forward and your drive wheels may lock.

A proper, smooth shifting of the gears of an automobile vehicle is very important because shifting them before the vehicle is ready would cause the following:

As a good driver, proper, smooth shifting is important because shifting before your vehicle is ready will cause it to je-rk forward and your drive wheels may lock.

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Maintain aircraft control and establish a glide. Identify the cause of the engine failure and attempt to restart the engine. Prepare for an emergency landing and communicate with air traffic control for assistance.

After an engine failure in flight, the first and foremost priority is to maintain control of the aircraft. Pilots must quickly assess the situation and establish a glide to maintain altitude and minimize the loss of altitude. By maintaining control, the pilot ensures the safety of the aircraft and its occupants.

Once control is established, the next step is to identify the cause of the engine failure. This could be due to various factors such as fuel system issues, mechanical failure, or a loss of power. The pilot should follow the appropriate checklist to attempt an engine restart if possible. This may involve actions such as switching fuel tanks, adjusting fuel mixture, or engaging the engine starter. If successful, the engine restart would restore power and enable the pilot to continue the flight.

If the engine restart is not possible or unsuccessful, the pilot must prepare for an emergency landing. This involves selecting a suitable landing site considering factors such as terrain, obstacles, and availability of emergency services. The pilot should communicate the situation to air traffic control and seek their assistance for guidance and any necessary emergency services.

In summary, the general steps to follow after an engine failure in flight are to maintain aircraft control and establish a glide, identify the cause of the engine failure and attempt a restart, and prepare for an emergency landing while communicating with air traffic control for assistance. By following these steps, pilots can maximize the chances of a safe outcome in the event of an engine failure.

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Answer: A leak in the system

Explanation:

The wait() command is a system call that enables a parent process to pause its execution until a child process finishes executing.

It is used for process synchronization and allows the parent process to control the order of execution. The parent process is blocked until the child process terminates, ensuring that the parent does not continue executing before the child has completed its task.

This is particularly useful in scenarios where the child process generates output or a result that the parent process requires.

Without the wait() command, the parent process would continue executing, and the child process output may not be available when needed. The wait() command is a fundamental feature of inter-process communication and process control, allowing multiple processes to coordinate their execution.

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