Agas sample has a volume of 0.225 l with an unknown temperature. the same gas has a volume of 0.180 l when the temperature is 35 ∘c, with no change in the pressure or amount of gas. part a what was the initial temperature, in degrees celsius, of the gas?

A55-kg pilot flies a jet trainer in a half vertical loop of 1200-m radius so that the speed of the trainer decreases at a constant rate. knowing that the plane has a speed of 550 km/h at point a, and the pilot experiences weightlessness at point c (i.e., the normal force from the seat bottom is zero), determine (a) the deceleration of the plane, (b) the force exerted on her by the seat of the trainer when the trainer is at point b.