Recent content by spaumn

Im assuming pV/T=constant, because the other two deal with molecules. so p(2.4m^3)/30=1.6m^3?

If 2.4m^3 of a gas initially at STP is compressed to 1.6m^3 and its temperature is raised to 30degreesC, what is the final pressure? I thought this would be a easy one but my answers are coming out and don't look right. I used pV=nRT p=1.6m^3 V=2.4m^3 R=8.31J(mol*k) --- universal gas...

Whoops, I just got on the fourms like 5 minutes ago, I didnt know there was a separate HW fourm, I will repost this there.

A girl swings back and forth on a swing with ropes that are 4.00m long. The maximum height she reaches is 2.00m above the ground. At the lowest poing of the swing, she is 0.500m above the ground. What is the girl's maximum speed? The answer is 5.42m/s, I just need to know how to do the problem.