Recent content by RJVoss

Now that I review my notes, I think I might have gotten this problem incorrect. Was I supposed to take the net force acting on block B and divide by the total mass of A + B + C to find the acceleration of the system?

This was a problem on an exam I had the other day and I want to know if my attempt was correct. Homework Statement Please look at the attached image. You have a system of two ideal pulleys set up on a table. Block A is hanging from a string on the left side of the table which passes by a...

Light traveling directly outward from the black hole is redshifted so much it loses all of its energy. Light traveling at an angle out from the black hole is bent back in towards the black hole.

I guess you could say muons are important in that they help validate einstein's theory of special relativity. They are created in our upper atmosphere and decay very quickly, so quick in fact, that at traveling 99% the speed of light, should decay before they reach the Earth's surface. Yet...

Question: Is it safe to say that if two photons were to simultaneously come in contact with a single atom, the total energy of the combined photons would be absorbed and then emitted as a single higher energy photon with a direction that is opposite that of the average angle of incidence of the...

This has to do with the force of gravity being stronger within solar systems, galaxies, and clusters of galaxies, than whatever force is causing the expansion.

Exactly. That was the problem I was having while taking the exam. The professor used the word "mix", which doesn't mean she was referring to a homogeneous mixture, just that the substances were attempted to be mixed, which lead me to answer with difference in density instead of polarity.

Water / alkanes "mix" Ok, so I had a chemistry exam today an missed one of the questions: Q: What prevents you from being able to mix an alkane with water? My original thought was that they cannot mix because water is polar, and alkanes are non polar...but then I started to think about the...

Ah ok, i did get the answer wrong, but I was pretty close! I'm sure he will give me partial credit for it because I was not too far off. Thanks

yea you are right, limacon

Had a trig exam today, got all problems right except for one that seemed to stump me: Change from polar form to rectangular coordinate form: r = 1 - 2cosθ I got the graph right I know that, but I couldn't figure a way to change it over. It kind of bugs me because I went through my entire...