Answer the following questions. Is asked to calculate, you must show all work for credit. 7. Calculate how long it would take the cannonball to hit the ground if shot using the setup above.

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

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

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.