Recent content by narps

If it is impossible to distinguish rest from motion, how is it that one of the twins' clock is slower than the other twins'? Shouldn't each twin appear to be the one moving with respect to the other, so both of their clocks run slow compared to the other's (even though this is impossible)? How...

I am having trouble understanding this. For example, say I have this: [positive point charge] [A][neutral conducting sphere][B] [...infinity] I know the point charge will create a field radially outward. But now I'm thinking of a test charge being brought in...

So I'm going to be an undergrad at Caltech starting this September. Physics is my main interest, although I also like math and computer science. My main question is what to major in. I will obviously major in physics, but I am also considering doubling in either math or computer science. I am...

The moon's gravitational force is weaker than the Earth's because gravitational force is directly proportional to mass, and the moon's mass is smaller than the earth's.