Recent content by joseph_kijewski

I might (?) be making progress here. Assuming temperature is constant, nRT should be constant as well, thus P is inversely proportional to V, and hence directly proportional to density. Thus I can substitute in 1.29*P/P(sea level) for density, yielding the equation dp=g*(1.29P/101,325)*dy. From...

I just don't really understand how to do that. I've been trying to formulate an equation but I assume it involves integration which I can do in some cases but don't conceptually understand how to apply to this problem.

1. The problem statement Solve the following problems assuming air density is proportional to respective pressure at each height: What is the normal pressure at the atmosphere at the summit of a. Mt. McKinley, 6168m above sea level and b. Mt. Everest, 8850m above sea level c. At what elevation...

Figured it out, thanks!

I guess I'm imagining the hose as horizontal, in which case I believe I would be right, but the angle isn't specified, so isn't it impossible to determine the answer?

Shouldn't x component be v*t, thus directly proportional to velocity?? By t is consistent, I mean that t must be consistent in both as h is consistent: -4.9t^2=h

Homework Statement You are watering your lawn with a hose when you put your finger over the hose opening to increase the distance the water reaches. If you are pointing the hose at the same angle, and the distance the water reaches increases by a factor of 4, what fraction of the hose opening...

I think I have a tentative answer but the more I think about it the less sense it makes to me, basically what I did was take m(proton)v(proton)+m(neutrino)v(neutrino)+m(electron)v(electron)=0 Then, I defined plane as the motion V(proton) of the proton and motion V(neutrino) of the neutrino. Next...

Homework Statement The decay of a neutron into a proton, an electron, and a neutrino is an example of a three-particle decay process. Use the vector nature of momentum to show that if the neutron is initially at rest, the velocity vectors of the three must be coplanar (that is, all in the same...

Homework Statement When a mass m sits at rest on a spring, the spring is compressed by a distance d from its undeformed length. Supposed instead that the mass is released from rest when it barely touches the undeformed spring. Find the distance D that the spring is compressed before it is...

Thank you!

Homework Statement A person jumps from the roof of a house 3.9-m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of .70m. If the mass of his torso (excluding legs) is 42 kg, find a. his velocity just before his feet strike...