I just realized the solution -- in the laser version, there is no detonation because the two laser crossings are not simultaneous in the frame of the lasers.
This is the same as the train paradox with simultaneous lightning strikes -- the lightning strikes are not simultaneous in both frames.
In Taylor and Wheeler, problem 6-5 "Detonator Paradox," a T-shaped plunger is not long enough to strike a detonator inside a U-shaped container. However, if the T-shaped plunger is moving relativistically, then in the reference frame of the T, the U shape is shorter and so the T is able to...
The answer is D. The induced charge is equal and opposite to the charge q.
I refer you to pg. 123 of Griffith's "Introduction to Electrodynamics" for a derivation.
But by intuition alone, it wouldn't make sense for the induced surface charge to be zero; the presence of the charge q will tend...
Energy has a very intuitive meaning.
In fact, you can FEEL energy.
The next time you go up a flight of stairs, notice how tired you get at the top (depending on your level of fitness, of course). Or do a long bike ride, run, or walk, and notice if you have to eat more afterwards to relieve...
Having gone through an Aerospace Engineering degree program, my experience and advice may help you out.
I decided on studying Aerospace Engineering because I thought engineering would fit my talents in building things, intuition for solving physical problems, and performance in math classes. I...
I have friends that didn't start a degree program until long after you are starting, so I agree--continue onwards with a strong will to succeed.
Just as others have said, many people go into college without a clear goal and without a reason to learn. Having these, you are at an advantage.
At...