An ideal gas is compressed to a quarter of the volume it was previously occupying. The gas is also heated to double its original temperature. 16.) By what factor does the pressure change? (A) 4 (B) 8 (C) 16 (D) 6 (E) 2

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

Why does lightning travel from clouds to the ground?

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?