Recent content by PhysicForFun

Ok thank you for explaining. It makes sense, but it doesn't seem logical. Regardless I will just accept it.

So the fact that is says work done by the gas isn't important? Am I reading too much into it? The gas does work when the volume expands. And the externalsystem does work whenever it compresses right? I might just be getting too caught up in wording. But I am curious. Thanks for the help so...

Homework Statement Given the cycle shown below, what is the total work done by the gas in the cycle? Homework Equations ΔU = ΔQ + ΔW W = PΔV The Attempt at a Solution W = 0 W = PΔV = 2 x (6-1) = 10 W = (1/2)bh = (1/2) (5-2) (6-1) = 7.5 W = W + W + W = 0 + 10 + 7.5 = 17.5 Since...

Ok thanks. That math makes a lot more sense then the given answer.

meter, but clearly that was wrong. It was probably inches lol. So the answer page that has the solution above should just be ignored? I mean it also seems like a plausible answer. The math just doesn't make sense.

Homework Statement 1. Find of the center of mass of the image below. 2. A human head weighs 8lbs, a human torso weighs 20lbs, and a human's hips and legs weighs 20lb. The headis 10m long, the torso is 25m long, and the hips and legs are 35m long. Find the center of mass of the body...