Questions
For both resistances, plot the charge curve of ln(1-V/V0) vs. time. From the slope of the...

For both resistances, plot the charge curve of ln(1-V/V0) vs. time. From the slope of the line, calculate the C (capacity). Please write your answer as large and neatly as possible.

Charge
R=10,000 R = 5,000
Voltage (V) Time (S) Time (S)
0 0 0
1 5.80 2.77
2 10.33 5.11
3 16.18 8.80
4 22.55 11.33
5 29.86 14.89
6 37.71 18.77
7 46.37 23.05
8 56.90 28.36
9 1:09.90 34.30
10 1:24.56 42.08
11 1:44.81 52.11
Value of capacitor = 6000μF

In: Physics

. Assuming IS = 0.01 pA for problem 3 , when a forward bias voltage of...

. Assuming IS = 0.01 pA for problem 3 , when a forward bias voltage of 0.80 V is across the junction, and the junction temperature Tj becomes to 700 C. Calculate:

(a) IS in a unit of pA (assume Dn, Dp, Lp and Ln are independent to Tj)

(b) Calculate IF.

Question 3 A pn junction has the doping concentrations of ND = 1017/cm3 and NA= 1015/cm3. When the junction temperature Tj is at 100 C, the. Calculate:
(a) ni in a scientific notation
(b) V0, in a unit of volt

(c) Cj in term of pF when a reverse-bias voltage of 10 V is applied, assuming the cross-sectional area of the junction is 1 mm2 , and m = 0.4.

In: Physics

You are studying two new traits that control tomato color (red v. albino) and shape (round...

You are studying two new traits that control tomato color (red v. albino) and shape (round v. long). You cross a red and round tomato plant with one displaying albino and long. The resulting F1 are all red and round. The F2 have the following phenotypes (8 points)

834 round, red

250 round, albino

272 long, red

80    long, albino

  1. Which of these characteristics are dominant?
  2. What are the most likely genotypes of the F2?
  3. What is the mode of inheritance? (Use words like, autosomal, sex-linked, dominant, epistatic, incomplete dominant, etc.)

d. Test your hypothesis using the Chi-square statistic.

In: Biology

A thin, cylindrical rod ℓ = 27.0 cm long with a mass m = 1.20 kg...

A thin, cylindrical rod ℓ = 27.0 cm long with a mass m = 1.20 kg has a ball of diameter d = 10.00 cm and mass M = 2.00 kg attached to one end. The arrangement is originally vertical and stationary, with the ball at the top as shown in the figure below. The combination is free to pivot about the bottom end of the rod after being given a slight nudge.

I am looking for the; How does it compare with the speed had the ball fallen freely through the same distance of 32.0 cm?

As well as the V swing and the V fall. (There is the exact question of this on chegg already posted if needing to see the other parts of the question in order to get this answer)

In: Physics

A professor tests whether the loudness of noise during an exam (low, medium, and high) is...

A professor tests whether the loudness of noise during an exam (low, medium, and high) is independent of grades (pass, fail). The following table shows the observed frequencies for this test.

   Noise Level   
Low Medium High
Pass 19 16 9 44
Fail 9 5 10 24
   28 21 19 N = 68

(a) Conduct a chi-square test for independence at a 0.05 level of significance. (Round your answer to two decimal places.)
=  

Decide whether to retain or reject the null hypothesis.

Retain the null hypothesis.Reject the null hypothesis.     


(b) Compute effect size using Cramer's V. (Round your answer to two decimal places.)
V =

In: Statistics and Probability

Gwen runs back and forth along a straight track. During the time interval 0≤t≤45 seconds, Gwen’s...

Gwen runs back and forth along a straight track. During the time interval 0≤t≤45 seconds, Gwen’s velocity, in feet per second, is modeled by the function v given by v(t)=(250sin(t^2/120))/(t+6).

(a) What is the first time, t1, that Gwen changes direction? Find Gwen’s average velocity over the time interval 0≤t≤t1.

(b) At time t=45 , how far is Gwen from her position at time t=0 ?

(c) Find the total distance that Gwen runs during the 45 seconds from time t=0 to time t=45 .

In: Advanced Math

This interesting activity examines the effect of weight upon terminal velocity. Gather together some nested coffee...

This interesting activity examines the effect of weight upon terminal velocity. Gather together some nested coffee filters. Leaving them in their original shape, measure the time it takes for one, two, three, four, and five nested filters to fall to the floor from the same height (roughly 2 m). (Note that, due to the way the filters are nested, drag is constant and only mass varies.) They obtain terminal velocity quite quickly, so find this velocity as a function of mass. Plot the terminal velocity, v versus mass. Also plot  v-squared versus mass. Which of these relationships is more linear? What can you conclude from these graphs?

In: Physics

give an example of a simple, undirected, weighted graph such that breadth-firstsearch outputs a search-tree that...

give an example of a simple, undirected, weighted graph such that breadth-firstsearch outputs a search-tree that is not a single source shortest path tree. Youranswer must

(a) Specify the graphG= (V, E)by specifyingVandE.

(b) Specify the weight functionw.

(c) Specify an ordering of the vertices and the search-tree output by breadth-first search assuming the specified graph and ordering.

(d) Specify a valid single-source shortest path treeT= (V, ET)by specifyingETand its root, the first vertex in your specified ordering.

(e) Include a clear explanation of why the search-tree output by breadth-firstsearch is not a valid single-source shortest path tree ofG.

In: Computer Science

Q5 A 3-phase, 60 Hz, 500 V, delta connected motor develops mechanical output of 250 H.P.,...

Q5

A 3-phase, 60 Hz, 500 V, delta connected motor develops mechanical output of 250 H.P., the power factor being 0·7 lagging (without capacitors) and motor efficiency 88%. A bank of series capacitors is connected in delta across the supply terminals. Two similar capacitors connected in series exist in each phase. Each of these capacitors is rated at 250 V, 800 µF. What is the new power factor of the motor after connecting the capacitor bank, also find out saving in the KVAR absorbed from power supply after improving power factor?

Figure1(Feeder comes from this side)

In: Electrical Engineering

(java) Show what the following program would print. Be sure to show work space. (Hint: Watch...

(java) Show what the following program would print. Be sure to show work space. (Hint: Watch out for integer division) SHOW WORK

public class Q2{

public static void main(String[] args){

int a = 1, b = 4, c = 5;

double x = 3.0;

a = method (b,x);

System.out.println( "first: " + a + " " + b + " " + c);

a = 12;

b = 5;

c = method(a - b, 10.0) * 2;

System.out.println( "then: " + c);

}

public static int method (int t, double v){

int w;

if (v > 5.0)

w = t / 3 + 4;

else

w = 25;

System.out.println( "in method: " + w);

return 2 * w;

}

}

In: Computer Science