What is the difference between a radio telescope, x-ray telescope, and optical telescope (both reflecting and refracting)

How long does it take for a star the size of the sun to become a red giant?

What causes daily tides?

Materials such as oil and gas are used as fuel because they have what chemical property?

What was the Kinetic Energy of a 2-kg plate that falls from 15-meters and right before it hits the ground? a. 225 Joules b. 15 Joules c. 300 Joules d. Not enough information given

A golf ball is at rest on the grass. What must happen to cause the ball to move? A balanced net force must be applied An unvalanced net force must be applied The net force must be zero The net force must be greater than the applied force

The energy content of a certain food is to be determined in a bomb calorimeter that contains 3 kg of water by burning a 2-g sample of it in the presence of 100 g of air in the reaction chamber. If the water temperature rises by 3.

If one side of switch is open and another one closed so what gone happen

At t = 19.8 seconds an object with mass 2.0 kg was observed to have a velocity of m/s. At t=20.02 seconds its velocity was m/s. What was the average (vector) net force acting on the object?

How do you get over a break up? (I know this has nothing to do with school work but I really need some advice.)

Suppose you have a hypothesis you believe to be correct what should you do to make you become a theory A. Write a letter to the noble prize committee B. Do the same experiment over and over again C.