15 Points! A sample of gas has a pressure of 21 Pa at 30 degF. What would its pressure be at 80 degF ? The volume of the gas remains constant.

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

Suppose two stars are located in region a of the h-r diagram shown in the figure below. star c appears much dimmer than star y as seen from earth. which star can be inferred to be nearer to earth and how do you know?

Derive the formula 2as=v² -u² where the formula have have usual meanings