An apple drops from the roof of a skyscraper, which is 830 m tall. Part A
Air resistance is zero. How many seconds will the apple take to reach the ground?
Express your answer in seconds.

Part B
Just before the apple hits the ground, how fast will the apple be moving?
Express your answer in meters per seconds

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels. the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause, directly and indirectly, for such a rise in sea level is