A receiver is taught to catch a football using "soft hands". They will intuitively guide the ball to a stop rather than trying to catch the football with stiff hands. If a football is traveling with a velocity of 25 m/s and the player catches the ball with over a 0.35 s time frame, determine the average Force that the player exerts which bringing the ball to a stop. (mass of football = 0.42 kg)

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to