Which of the following is a scalar quantity? A.
displacement
B.
time
C.
velocity
D.
force

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

What is the difference between mass density and weight density?

Is a volume of space that is empty of matter.