A70 kg high-jumper launches himself in the air with an upward momentum of 315 kg-m/s. what is his initial velocity? a. 4.5 m/s upward b. 9.8 m/s downward c. 70.0 m/s downward d. 385 m/s upward

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

Astronomers studying the planet of rhombus have detected sedimentary rock on its surface. one astronomer wonders if material in this sedimentary rock used to be in igneous rock deep in rhombus’s interior. can igneous rock become sedimentary rock? explain your answer.

The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength