Acompression is in a medium caused by a longitudinal wave a)region of high density b)region of low density c)region of high altitude d)region of zero pressure

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

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

Why does gravity have a lesser than grater effect on higher altitudes?