<p>Yes. Specifically, the threshold frequency (photoelectric effect; f_threshold=work function/h).</p>
<p>The masses one was easy (I hope). the closer you are the greater the potential, and vice versa. I know the answer to the second one was the one in the midway point of a planet ( I think).</p>
<p>dean: i put frequency
was that the one with like.... metal? or stripping something? </p>
<p>sn3: if the planets were like x--------y
i put at the leftmost point for least gravity on y
but more most gravity on x, i dont know if it was the point IN planet x, or the point on the SURFACE of planet x.... i put surface</p>
<p>yes frequency</p>
<p>yes, i think it's the point farthest away from y</p>
<p>Was that the larger force? I think the second one was the one right on the surface, since it is...oh wait, it should have been the one inside the planet - GM/r^2, so smaller r w/ same mass = greater force.</p>
<p>However, how would the radius be shorter with the same mass, unless the density of the planet changed.</p>
<p>I definitely messed up some of the first 20 problems, lol!</p>
<p>For the one with the de Broglie, I put alpha because it has highest mass, and therefore momentum.</p>
<p>For the one with the dielectric in the capacitor, I think the capacit increases, charge increases, and voltage stays same?</p>
<p>And what about the one with two coils and inducing current in the other one? I think i put Altern current.</p>
<p>i think the greatest gravitational force occurs on the surface of the planet</p>
<p>de Brogile - was alpha</p>
<p>Dialectic increases charge and capacitance, voltage same</p>
<p>The coil one - no idea.</p>
<p>Eistiens law of re lativity stated
1: the laws of physics are the same for all frames of reference moving at constant velocity with respect to one another
2 the velocity of light in a vacuum is the same for all observers regardless of their states of motion or the motion of the source of light
so II and III are correct for the firsts question and I is correct for the second
what exactly did the leave problem ask</p>
<p>yeah dude i totally got like 20 wrong...
for the capacitor i put voltage stays the same, the other 2 increase</p>
<p>for the funky coil current one, i put everything for the heck of it
dumbass me</p>
<p>I did the same for the coil current one.</p>
<p>what were the choices for that coil current one?</p>
<p>Coil:
alternating current
(?) constant current (I think)
increasing current</p>
<p>the leaf problem asked what would cause the positive leaves to repel even more, I think.</p>
<p>There was one that asked for KE for a force F over time T and dist d. I think I put F*t or something. It threw me off.</p>
<p>What about the second question for pulling a sled at 30 degrees?</p>
<p>oh, a current is only induced with a changing magnetic field. so i put alternating current + increasing current only.</p>
<p>What was the answer to the question about determining the velocity of the pendulum. Was it the length, short angles, or period of twelve/twelve?</p>
<p>There needs to be a change in magnetic flux to induce emf and then current, so it can't be a constant current. so it seemed like it would be both AC and increasing current.</p>
<p>Sled was at 30 degrees; u=gsin(theta)</p>
<p>For the pendulum one, I think you needed to know the length and the velocity at bottom? because T=1/2pi * sqrt(L/g).</p>
<p>umm didn't that question just ask about finding the period of the pendulum? i put down measuring 12 cycles and dividing by 12</p>