A ball is dropped from 34.8 ft above the ground. Assume that air-drag is negligible in this case. (a) At what height is half of its energy kinetic and half potential?
ft

(b) Using energy considerations only, what is the velocity of the ball just as it hits the ground?

ft/s

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).