Air within a piston–cylinder assembly, initially at 30 lbf/in.2, 510°R, and a volume of 6 ft3, is compressed isentropically to a final volume of 1.2 ft3. Assuming the ideal gas model with k = 1.4 for the air, determine the (a) mass, in lb, (b) final pressure, in lbf/in.2, (c) final temperature, in °R, and (d) work, in Btu.

In an experiment, how can i change human errors? be specific.

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

Most short-period comets do not have randomly oriented orbits because