What is meant by the term 'mass movement'?

A car moves at a speed of 20 km/h for 15 minutes and then at a speed of 60 km/h for next 15 minutes. Calculate the total distance covered by the car.

What does the speed of sound depend on?

Fission: can produce krypton, strontium, barium, and xenon is the type of nuclear reaction that occurs in stars takes two small atoms and fuses them together to create a larger atom only produces a minimal amount of radioactive waste

Choose the answer that explains the photoelectric effect.

A spring has a spring constant of 30000 N/m. How far must it be stretched (in meters) for its potential energy to be 47 J?

A golf ball is hit with an initial velocity of 155 ft/s at an angle of 23 degrees with the horizontal. After 1.4 seconds, how far has the golf ball traveled horizontally and vertically?. a. 199.7 feet horizontally and 75.2 feet vertically. b. 60.

What is the kinetic energy (in joules) of a. 2 kg softball thrown at a speed of 40 m/sec? (answer should be in correct units)

How is the information sent back to earth by the robots?

During which change of state do atoms lose energy? sublimation freezing boiling melting

Why does the rotation of earth require people to establish times zones?