An object is dropped from an altitude of one earth radiusabove earth's surface. if m is the mass of earth and r is itsradius the speed of the object just before it hits earth isgiven by: a. √gm/r b. √gm/2r c. √2gm/r d. √gm/r2 e. √gm/2r2

The plum pudding model of the atom states that ?

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s

Which component of the earth’s atmosphere is decreased due to photosynthesis?