1. A roller coaster's velocity at the top of the hill is 5 m/s. Five seconds later it reaches the bottom of the hill with a velocity of 30 m/s. What is the acceleration of the coaster?
Can you help with both?

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