Homework Statement
Find the value of Vk
http://oi54.tinypic.com/2s6x005.jpg
Homework Equations
The Attempt at a Solution
Assuming dependent Vk = 12i
-60 + 4i + 12i + 12i = 0
-60 + 28i = 0
i = 2.14
Vk = 12 * 2.14 = 25 .68 ?
Answer is 18. Can someone tell me where I am going wrong ?
Basic Circuit - Nodal Analysis
Homework Statement
I am trying to find ix and iy.
Here is the figure
http://tinypic.com/view.php?pic=x2mr93&s=7
The Attempt at a Solution
Node 1
-3 + V1/0.2 + (V1-V2/0.5) = 0
-.06 + 0.1V1 +0.2V1 - 0.2V2 =0
-.06 + 0.3V1 -0.2V2 = 0...
Homework Statement
In the Figure below if V 1=10 V and i x= -2 A, what is the power supplied by the dependent current source?
Homework Equations
The Attempt at a Solution
The answer is -60. But I am getting 60. whenever It's power supplied doesn't it mean the current is...
Homework Statement
About this circuit:
http://oi54.tinypic.com/eqwktd.jpg
If I were to find ix. Would I be using supermesh?
Homework Equations
The Attempt at a Solution
Question:
Write a program that reads a four-bit binary number from the keyboard as a string and then converts it into decimal. For example if the input is 1100 the output should be 12.
Attempt:
import java.util.Scanner;
public class run
{
private static final String number = null...
We are asked to reverse a sentence , example: I am going. ==> .going am I
Attempt:
import java.util.Scanner;
public class Assign2
{
public static void main (String [] args)
{
String line= new StringBuffer().reverse().toString();
String line2 = new...
Write a program that reads four-digit integer as a string , such as 1998 and then displays it, one digit per line, like so:
1
9
9
8
Attempt:
Scanner keyboard2 = new Scanner (System.in);
String integer2= "Input a 4 digit number:";
System.out.println(integer2);
How do I make it read...
Two containers contain the same gas at different temperatures and pressures, as indicated in the figure. The small container has a volume of 1 L, and the large container has a volume of 2 L. The two containers are then connected to each other using a thin tube, and the pressure and temperature...
Homework Statement
After a spacewalk, a 7-kg tool is left 54 m from the center of gravity of a 21-metric ton space station, orbiting along with it. How much closer to the space station will the tool drift in two hours due to the gravitational attraction of the space station?
Homework...
Homework Statement
summation --> (-1)^n+1 (2/3)^n (I don't know how to do the symbol for sum)
The Attempt at a Solution
I) lim n-->∞ (2/3)^n = limit does not exist ? It diverges ?
P.S I am not sure if this is true. Any explanation will be a great help. Thanks.
Homework Statement
The coordinates of the center of mass for the extended object shown in the figure are (L/4, −L/5). What are the coordinates of m1? (Assume m1 = 4 kg, m2 = 2 kg, and m3 = 3 kg. Use any variable or symbol stated above as necessary.)
Here is the diagram ...
Homework Statement
Two balls of equal mass collide and stick together as shown in the figure. The initial velocity of ball B is twice that of ball A. (Take θ = 56°.)
(a) Calculate the angle above the horizontal of the motion of mass A + B after the collision.
(b) What is the ratio of the...
The electron-volt, eV, is a unit of energy (1 eV = 1.602 10^-19 J, 1 MeV = 1.602 x 10^-13 J). Since the unit of momentum is an energy unit divided by a velocity unit, nuclear physicists usually specify momenta of nuclei in units of MeV/c, where c is the speed of light (c = 2.998 108 m/s). In the...
Homework Statement
A horizontal slingshot consists of two light, identical springs (with spring constants of 74 N/m) and a light cup that holds a 1-kg stone. Each spring has an equilibrium length l0 = 49 cm. When the springs are in equilibrium, they line up vertically. Suppose that the cup...
Homework Statement
Find V1 and i1 using nodal analysis
The Attempt at a Solution
I know i1 is 0 because of a circuit break.
But, I am not able to figure out how many nodes there are in this circuit?
I thought there are four nodes connected to the reference point but the book...
Homework Statement
Two baseballs are thrown off the top of a building that is 7.32 m high. Both are thrown with initial speed of 58.7 mph. Ball 1 is thrown horizontally, and ball 2 is thrown straight down. What is the difference in the speeds of the two balls when they touch the ground...
[b]3. The Attempt at a Solution [/b
I tried to use the
X= Vixt + 1/2axt^2 => 0= 1/2axt^2+ Vixt + X
To find the time since there isn't a horizontal distance given.
Then I realized the initial velocity for x and y direction can't be the same , but I don't have the angle.
Do i have to find...
Homework Statement
An electron moves in the positive x-direction a distance of 2.44 m in 3.10 *10-8 s, bounces off a moving proton, and then moves in the opposite direction a distance of 1.68 m in 3.53*10-8 s.
The Attempt at a Solution
to find the average velocity I used the distance...
Homework Statement
A truck travels 3.45 km north and then makes a 90° left turn and drives another 4.10 km. The whole trip takes 4.50 min.
1)With respect to a two-dimensional coordinate system on the surface of Earth such that the y-axis points north, what is the net displacement vector of the...
Homework Statement
An object starts from rest and has an acceleration given by
a = Bt^2 − 1/2Ct, where B = 4.5 m/s^4 and C = −2.2 m/s^3
(1) What is the object's velocity after 7.5 s? (Indicate the direction with the sign of your answer.)
(2) How far has the object moved after t = 7.5...
Homework Statement
The position of a particle moving along the x-axis is given by x = 4.7t2 − 3.2t3,where x is in meters and t is in seconds. What is the position of the particle when it achieves its maximum speed in the positive x-direction?
Homework Statement
Solve for Req
The Attempt at a Solution
The resistors in the middle can be added to total of 5 ohms. So then then 5v +5ohms = 10 ohms
Then they are all in series 1.5+10+ 1.5= 12.5? What I don't understand is what do i do with
Rx? or 12.5 is Req?
Here is...
Homework Statement
I need to solve the circuit. I have trouble comprehending absorbed/supplied power concept.
The Attempt at a Solution
So, if power is being supplied by Vx then the current is passing out of the negative terminal towards the dependent source 4x and the element A?
Vx *...
Homework Statement
The question asks me to explain why the graphs should be a straight line?
We had to make a Distance vs Time^2 graphs.
The Attempt at a Solution
On a position x time graph If the ball is falling only way it can be a straight line if the velocity is constant , right...
Homework Statement
What would be the shape of Distance vs Time Graph when a ball is falling?
Please explain. Thanks you
The Attempt at a Solution
I think it will be a curve since the acceleration is constant (9.8 m/s^2) . the slope under the curve will be velocity which will...
Homework Statement
A Force of 7 pounds is required to stretch a 40 inch spring to a length of 43 inches. How much work will be done in stretching the spring an additional 6 inches from its already extended length of 43 inches?
The Attempt at a Solution
I know how to integrate , just...
The power supplied by a certain battery is constant 6 W over the first 5 mins, zero for the following two minutes, a value that increases linearly from zero to 20 W during the next 10 minutes, and a power that linearly decreases 20 W to zero in the following 7 minutes. What is the total energy...