Which of the following is an example of convection?

the rays of the Sun warming the earth

a hot oven warming the air around it

a hot object transferring heat to a cooler one

hot air rising and cooler air falling

What do we mean by gravitational time dilation? A) It is the idea that time runs slower in places where gravity is stronger. B) It is the idea that clocks run slow for people moving at high speed past you.

Block 1, of mass m1 = 3.90 kg, moves along a frictionless air track with speed v1 = 31.0 m/s. It collides with block 2, of mass m2 = 51.0 kg, which was initially at rest. The blocks stick together after the collision.

Classify each of the following items as a rigid body, a system of rigid bodies, or a nonrigid body: a. a fishing pole, b. a diving board, c. a mechanical spring, d. a bowling ball, e. a baseball bat, f. a system of gears, g.

Elements heavier than hydrogen are formed when light elements undergo nuclear fusion. Fusion takes place within stars at temperatures nearing 108K. Explain why this high energy is required for fusion to occur.

Which of newtons laws explain the orbit of a space shuttle around earth and the orbit around the sun

A train moves at constant velocity of 50km/h. how far will it move in 0.5h?

Which process best describes part of a scientific investigation? O designing a solution O evaluating the conclusion O evaluating the solution O identifying the conclusion

How many neutrons are in Cesium-130

You are standing outside during the daytime. How can you see a blade of grass? A. Light is produced by your eyes and travels out to the grass. B. Light is produced by the grass and travels straight to your eyes. C.

Are cosmic rays and gamma rays invisible or do they have color?