Recent content by mettw

Hi Almarpa, I'm in a similar situation to yourself. I have a BSc in physics and after twenty years am now planning on going back and getting a Grad. Dip. So I have been reviewing all of my undergraduate courses. I have found Taylor's chattiness a little irritating, but it definitely covers...

Thanks! I see now: mg/A \times \Delta V = mgh. The correct equation is W = (p_{atm} + mg/A)\Delta V = 0.11964 J/s , which gives the correct answer. I suppose I should have done a more detailed diagram of the problem rather than just trying to work it out in my head. Thanks a heap.

Homework Statement A cylinder has a well fitted 2.0Kg metal piston whose cross-sectional area is 2.0cm^2. The cylinder contains water and steam at constant temperature. The piston is observed to fall slowly at a rate of 0.30cm/s because heat flows out of the cylinder walls. As this...

With an average it doesn't matter what happens in between - just what the state is at the two ends. The point of the question is to get you to see that the maximum speed reached is irrelevant, all that matters it the initial and final speed and the time taken.

Motion in 1 dimension - Problem 2 A skateboarder finds a long straight stretch of road of constant gradient. The road is 150m long and 100m down the hill is a speed camera. The skateboarder starts from rest at the top of the hill and as he passes the speed camera it goes off. Later in the...

Yes. I don't know if that would be a general feeling. After all, two of the millennium problems are physics problems.

I'm not sure if this is really the right forum for this, but the other forums insisted that all homework like posts should go here. In his book "How to think like a Mathematician" Kevin Houston says that the best way to learn a subject is to create your own problems, since doing this requires...