Work the following problems.

1)Express the speed of light…

a. In ps/cm

b. In ns/foot

2)Consider a signal with a rise time of 200 ps.

a. What is the knee frequency of the signal?

b.Consider the signal on a trace over an insulator with ε_r = 4. How long is the rising edge, in inches?

c.How long does a trace have to be in order to be considered “distributed”?

3)The same signal is routed on a circuit board. The output capacitance is 15 pF and the resistance of the gate that drives the signal is 20 ohms.

a. What is the risetime of the signal, taking into account the R and C of the output driver?

b. What is the new knee frequency, after RC filtering?

4) A circuit board is being designed with ε_r = 4.2. A trace is laid out with a length of 2.5 cm.

a.What risetime is needed for the trace to be considered distributed and not lumped?

b.What knee frequency corresponds to the risetime you calculated in a?

c.The signal has a risetime of 50 ps. What RC (that is, an RC time constant of what value) is needed to slow the signal down to the risetime you calculated in a?

d.The load capacitance of the signal is 20 pF. What value of resistor should be inserted onto the line to obtain the value of RC you calculated in c?

(a) What are Multiplexers, and why are they important in computers

(b) What are D flip-flops, and how are they used in computers?

I am supposed to do a communication systems project including MATLAB. Topic maybe something related to for example OFDM system, AMR reading using gprs etc. Or any communication systems related topic. Can some one provide with the brief project description and MATLAB code?

Show that the set {DiracDelta(t-tao): t, tao are real numbers} is a basis set for the analog complex signal space.

Write a new MATLAB function as described in the following:

1. The new function will have three input parameters: f, W, C. 2. Parameter f will specify the frequency of the square wave. 3. The parameter W will specify the width of the single pulse as a number of sample periods. 4. The parameter C will specify the number of square wave cycles. 5. Calculate a number of samples, N, to run the simulation for both waveforms. 6. Create one signal that is a square wave of period 2W samples and lasts for a duration of C cycles. 7. Create a signal beginning with a single pulse of amplitude 1 and a width of W samples followed by N-W samples with amplitude of 0. 8. Plot time and frequency domain plots for each. Use subplots to show all four graphs on the screen at once, arranged the same way as in the reference lecture slide. Scale the plots as necessary so that the desired characteristics can be easily seen. Label the x-axis with the correct units of time/frequency. Run the new function with f=1000, W=20, and C=10.

Make circuit diagrams for each of the objectives:

-tTo observe the input voltage and excitation current waveforms and the hysteresis loop resultingfrom the two waveformsof an unloaded transformer, transformer harmonic components, and tomeasure the power supplied to and power factor of the transformer.

also

-To observe the current waveform and the harmonics of a series lamp-diode circuit, and measure the power supplied to and power factor of the circuit.

Create a specification for a multimeter. This is a technical writing question and must have correct headings and numbering, and must contain proper main heading, an introduction, subsection headings, and proper paragraph numbering.This needs to include: Inputs, Outputs, Functions, Safety

I am supposed to do a communication systems project including MATLAB. Topic maybe something related to for example OFDM system, AMR reading using gprs etc. Or any communication systems related topic.

Can some one provide with the brief project description and MATLAB code?

Underline all the correct answers. Explain why an answer is correct or why it is wrong. You are supposed to select all of the correct answers (1-6) for each roman numeral (I-III)

--Please justify/explain answers thoroughly--

Problem 7. If photons with energy of 1.7 eV was applied to A Si Wafer is at 300k (E_g for Si =1.12eV), the valence and conduction band are

(I)

1-      Both are completely empty

2-      Both are completely filled.

3-      Both are partially empty.

4-      Both are partially filled.

5-      None of the above

6-      All of the above 1-4.

(II)

1-      CB band is completely empty and VB is completely filled.

2-      VB band is completely empty and CB is completely filled.

3-      CB band is partially empty and VB is completely filled.

4-      VB band is partially empty and CB is completely filled.

5-      None of the above

6-      All of the above (1-4)

(III)

1-      CB band is partially filled and VB is completely filled.

2-      VB band is partially filled and CB is completely filled.

3-      CB band is partially empty and VB is partially filled.

4-      VB band is partially empty and CB is partially filled.

5-      None of the above

6-      All of the above (1-4)

I would like a brief explanation of how to derive the equation for the LM317 voltage regulator as well as how it operates. I am attempting to explain how it works for class tomorrow but dont believe I am correct in my explination.

For a balanced three-phase system, show that the total power is constant. ?

makes it in c++

Kyal is in line at the DMV he has number 325, they are currently serving customer 320.

Use a switch statement to determine which type of loop he needs to use to count to his turn being called.
f = for loop w = while loop d = do-while loop
Output the appropriate loop type from the switch.

Then use any loop type to get from 320 to 325.

Select the appropriate loop type f= for, w =while, d= do-while
[output of appropriate loop type]
320
321
322
323
324
325
It is your turn

the projram starts her..

#include <iostream>
using namespace std;

int main() {

   // Declare appropriate variables
    int number = 320;
   
    //Output the prompt & recieve input
    cout << "Select the apropriate loop type f= for, w =while, d= do-while" << endl;
   
    //Switch to determine & output the appropriate loop type
   
   
    //Loop that goes from 320 to 325 and outputs each number then "It's your turn"
   
   

   return 0;
}

Edit the given program to produce the following output in c++ mode:
- Take in the name of a superhero & tell him how many villains he/she has to defeat today - The number of villains is randomly generated and should be a number between 11 and 42.
- Use a seed of 7.
Hint: Compile the program first before making edits

What is your name?
Hello Captain America
There are 42 villains you need to defeat today
Oops! one of the villains was able to multiply himself by  a power of 3.
There are actually 74088 villains.

the program starts her

#include <string>                                  //make sure that all necessary libraries are included & correct
using namespace std;

int main() {
string name;
int number;

  
   cout << "What is your name?" << endl;
   cin >> name;
   cout << "Hello " << name << endl;
   cout << "There are "<< number >> " villains you need to defeat today"<< endl;          // edit and include any necessary code
   cout << "Oops! one of the villains was able to multiply himself by a power of 3. There are actually villains." << endl;
  
  
  

   return 0;
}

The architectural and HVAC plans for the Uytengsu Building on campus are provided. The details of the equipment installed are provided. From this information determine the estimated overall building heating and cooling requirements and compare to the "rule of thumb" information given in the first chapter. Briefly, write up your findings in a technical memorandum showing your calculations stating any assumptions. Upload your findings in a pdf.