Recent content by james brug

Homework Statement A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.05 atm at 22.0^\circ C. The round part of the tank has a radius of 10.0 cm , and the gas is supporting a piston that can move up and down in the cylinder without friction. What is the...

How did you find part A? ? You are supposed to account for the contraction of the cylinder.

A transverse wave on a rope is given by y(x, t)= (0.750\; {\rm cm})\, \cos ( \, \pi [(0.400\;{\rm cm}^{ - 1})x+(250\; {\rm s}^{ - 1})t]) Find the period. This should be simple, but I keep getting the wrong answer in Mastering Physics. I can't find any explanation in my book, and it's...

Yes, that is correct. \sqrt{1372\;m^2/s^2+(19.8\;m/s)^2} = Life, the Universe, and Everything

I have found the answer.

Can someone please help ?

The solution to this should be the initial velocity it takes to get to top of the hill plus the velocity needed to clear the pit, right? I get about 56.8 m/s which is apparently wrong. \sqrt{1372}\;m/s+19.8\;m/s

I had already found that out, but thanks anyway.

Never mind. I've solved it myself through some careful research and considerable effort. It is unfortunate that no one was able to answer this in time. Perhaps you people want some monetary compensation? Or maybe no one liked my problem. Not particularly hard, is it?

Homework Statement Two blocks are connected by a very light string passing over a massless and frictionless pulley . The 20.0 N block moves 75.0 cm to the right and the 12.0 N block moves 75.0 cm downward. Find the total work done on the 20 N block if \mu _s\;=(coeff. of static...

What about the work done on the other block? Is it the same?

What first statement?

T would give me the force on the 20N block and thus the work, yes? a=12N/total weight?

That's probably it. There is a problem nearly identical to this in the book, but it says the blocks are moving at a constant speed.

Work problem--blocks,pulley Homework Statement Two blocks are connected by a very light string passing over a massless and frictionless pulley . The 20.0 N block moves 75.0 cm to the right and the 12.0 N block moves 75.0 cm downward. Find the total work done on 20.0N block if there is...