Recent content by lightofthemoon

Homework Statement In this part of the lab you tracked a single peak as you moved a microphone in order to get a good value of the speed of sound. This question will lead you through a similar process with just two measurements. (The lab set up: speaker emitting the signal faced one microphone...

Why isn't it based off of the kq/R at the sphere? Not sure it should be if I don't use the sphere as a basis... it is kq/8R?

I don't really think I understand what you are saying. So standard potential at the sphere is kq/R and potential at infinity is 0 So when you add the dielectric shell the potential at infinity will increase because there is less potential because of the dielectric shell? So it should be...

Since the potential at infinity is told to be zero, shouldn't it still be zero no matter how the dielectric affects it? If I use the equation V0/κ = Vd , 0 / 2 = 0...

Homework Statement A solid conducting sphere of radius R and carrying charge +q is embedded in an electrically neutral nonconducting spherical shell of inner radius R and outer radius 9 R . The material of which the shell is made has a dielectric constant of 2.0. Relative to a potential of zero...

No, I didn't use the initial KE at all. Work to bring the particle to the origin = qEx So I set U=qEx and solved for x (how far it would get to the origin) x = U / qE E = kq / r E = (9 * 10^9 * 1.6 * 10^-19 / 21) - (9 * 10^9 * 1.6 * 10^-19 / 19) E = -7.22 * 10 ^-12 U = k q1 q2 / r U = (k *...

I got the right answer through U / qE = x Answer was 1.004 m But can someone explain why I didn't need to use the initial speed of the electron? (Or did I actually need it and just got the right answer by chance?) Thank you

Homework Statement An electron and a proton are held on an x axis, with the electron at x = + 1.000 m and the proton at x = - 1.000 m. If a second electron is initially at 20 m on the x axis, and given an initial velocity of 350 m/s towards the origin, it does not reach it. How close to the...

Oh, ok. Thanks for your help! :smile:

Oh, I see how to do the problem But why don't I have to consider linear impulse as well since the ball is also traveling linearly?

I don't really understand. Impulse= change in momentum = Ft momentum = mv, so don't I still have to find the initial velocity as well as μ?

Homework Statement A solid spherical ball of mass 0.75 kg and radius 5.0 cm is thrown onto a horizontal surface with coefficient of kinetic friction μ . It’s initial velocity at time t = 0 is horizontal and its initial angular velocity is zero. After rolling with slipping for a time t1 = 0.76...

1st year university student here! Nice to meet you all.