Homework Statement
An object is placed 60 cm from a thick double convex lens, with faces of radii of curvature 20 cm and 30 cm, with thickness of 2 cm, and index of refraction is 1.5. Find the position of the image...
Hi, I'm looking through my teacher's notes and he says that a wave function for a sinusoidal wave can be written: y = A sin (ω t – k x) or y = A sin (k x - ω t)
The textbook gives it in the second form. I think that using one over the other gives the same answer but in the opposite sign. I...
Homework Statement
The plastic rod of the length L=1 m has a non-uniform charge density λ=cx where positive constant c =2x10^-6 [some unit]. What unit c has to have? Find the electric potential at the point on the x axis 1 m to the left from the left end of the rod. Find the electric field at...
Homework Statement
The plastic rod of the length L=1 m has a non-uniform charge density λ=cx
where positive constant c =2x10^-6 [some unit]. What unit c has to have? Find the electric
potential at the point on the x axis 1 m to the left from the left end of the rod. Find the
electric...
Hi, if you have the book: Physics for Scientists and Engineers 8E, Serway Jewett
On page 675 (Chapter 23), Example 23.8 there is a step taken during the integration I don't understand:
How do you go from "2r dr" in the numerator to d(r^2)? If there is info or link to the property of...
Homework Statement
In Physics for Scientists and Engineers Volume 1 Eighth Edition (Serway, Jewett)
Number 55. in Chapter 5, I checked the answer key and would like to know why they don't consider the forces of friction in a), b), c), d), and e)? This confuses me. Thank you.
Homework...
Homework Statement
http://tycho.physics.wisc.edu/courses/phys201/fall06/Discussion/Disc14Solution.pdf [Broken]
problem 38, part b)
Homework Equations
I final w final = I initial w initial
The Attempt at a Solution
I understand that the snowball is introducing a net torque and I know that...
Homework Statement
Problem 7.29:
http://cas.umkc.edu/physics/wrobel/phy240/Homework%20%205.pdf
Homework Equations
dr= R d(theta)
The Attempt at a Solution
I don't understand how to get R d(theta) = dr from the last part of the question, any explanation about how it works is...
Homework Statement
Hi all, I'm trying to understand why my second way of solving this problem doesn't work:
A 3.00kg object is moving in a plane, with its x and y coordinates given by x= 5t^2–1 and y=3t^3 + 2, where x and y are in meters and t is in seconds. Find the magnitude of the net...
1. A piece of copper whose density is 8.93 gm/cm^3 weighs 180 gm in air and 162 gm when submerged in a certain liquid. What is the density of the liquid?
2. d = m/v
3. I wasn't sure how to compute this but I calculated the volume of the copper based on its density and air weight...