Hey
Hey there,
The only thing that is throwing me is M = -4.
That means h' = M * h = -4 * 6.0 cm = -24 cm
Obviously, it is not going to have a negative size :)
Can somebody explain to me what I am doing wrong here. After I have this negative sign figured out, I think I will...
Homework Statement
Two converging lenses, the first with focal length 40 cm and the second with focal length 33 1/3 cm, are separated by 10.0 cm. An object of height 6.0 cm is placed 20.0 cm in front of the first lens. What are the size and orientation of the final image?
A. 6.0 cm...
Hey there,
For reference, the answer key says 6.4 W/m2 is the correct answer.
The answer I got was 6.4 * 10^-4 W / m^2, so I am just wondering the answer is a typo.
I am not sure where you are getting at dlgoff? Please explain :)
Thanks in advance.
Travis Walters
Homework Statement
If a 20-W laser beam, which has an initial diameter of 2.0 mm, spreads out to a diameter of 2.0 m after traveling 10,000 m, what is the final intensity of the beam?
A. 20 x 10-4 W/m2
B. 20 x 10-6 W/m2
C. 20 x 10-8 W/m2
D. 6.4 W/m2
E. 6.4 x 10-6 W/m2
Homework...
Homework Statement
The north end of a bar magnet is pushed downward toward a wire loop in the plane of the paper. In which direction is the induced current, and which way is the induced magnetic field?
A. clockwise, into the paper
B. clockwise, out of the paper
C. counter-clockwise...
Hello again,
First, you guys have been a really big help so far and I am very thankful :)
Let me expand on this question a bit and get into some theory.
Theoritically, let's say the resistance in the 2nd and 3rd resistors are higher than the 1st resistor. Does that mean ALL the current...
Hey there,
I see what you mean about them being in opposite directions.
However, since B1 is in the negative Z direction, would that answer be -3*10^-5 T instead of 3*10^-5 T? Likewise, since B2 is in the positive Z direction, would that answer be 1.3*10^-5 T instead of -1.3*10^-5 T?
If...
Homework Statement
One wire, lying on the x-axis, carries a current of 8.0 A in the positive x-direction. Another wire, lying on the y-axis, carries a current of 12 A in the positive y-direction. What is the magnitude of the magnetic field at (x, y) = (8.0 cm, 12.0 cm)?
Homework Equations...
Hey there,
A fellow student responded that power follows the path with the least resistance.
However, from my thinking, there are three paths that have equal resistance. So my new question is how is power shared among these paths? Is power shared equally if there are multiple paths of...
Hey there,
I found something in the class that says according to convention, the direction of electric current is defined as the direction positive charge is transported.
I am pretty sure current is starting from the positive side of the battery.
However, I am not sure what you mean by...
Hey there,
Thats exactly what the curcuit looks like out of the text.
The answer sheet has been known to have some wrong answers on it.
I guess I will forward this question to the professor.
I will let you know what comes out of it.
Thanks again.
Travis Walters
Hello everyone,
I am trying to learn about electrical circuits for a physics class.
I have attached a drawing of a circuit related to my question. The battery is 9 volts and each resistor has a 3 ohm resistance.
I need to figure out the resistance through the middle resistor.
The...