Recent content by mruss

Re your points: 1) I did neglect #1-5 as you mentioned. Do you think assuming those effects are negligible is an OK approximation? 2) I have already worked out the related question, height of water supported by 1atmos. I agree it's an interesting problem. 3) Fair point about mixing...

Homework Statement Problem Statement: Imagine you had a very long straw, one end is in the ocean (sea level) and the other end is in space. Air pressure at sea level is a standard atmospheric pressure and space is a perfect vacuum. Plot "height of water in straw" vs. time...

Thanks Tanya, I appreciate the response. I guess conservation of momentum and conservation of (kinetic) energy are not enough to solve for the masses in an elastic collision. Do you know what additional information/formulas I would need to actually nail down the two masses, rather than just...

Yes, I agree that I've done that. What I'm trying to do is solve for 2 masses in an elastic collision. Do you have advice on how to do that?

This isn't an actual homework problem, but it feels like it could be. Homework Statement Two masses, m1 and m2 are involved in an elastic collision. The initial velocities v1_0 and v2_0 are 1 and -2, respectively. The final velocities v1_1 and v2_1 are -3 and 0, respectively. Solve for...

Disclaimer: new poster to this forum so let me know if this is giving too much help M is moving at velocity of v_0 in a static reference frame. But from the reference frame of M, it is not moving at all (almost by definition). Instead from M's point of view, it looks like m is approaching M...