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 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 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
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 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 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 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 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 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., 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 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