Aball is thrown straight up from the ground with an initial velocity of 33.8 m/s; at the same instant, a ball is dropped from the roof of a building 26.3 m high. after how long will the balls be at the same height? the acceleration of gravity is 10 m/s 2 . answer in units of s.

How does convection affect our atmosphere? our layers of earth? our oceans?

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.