Aparachutist jumps from a plane. he accidentally drops his cell phone at an altitude of 100 m when he has a velocity of 12 m/s down. what is the velocity of the phone when it hits the ground? assume there is no air resistance acting on the phone.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.