Which of the following reactions release more energy?

fusion reactions

nuclear chain reactions

fission reactions

chemical reactions

You can't see, touch, or smell the ozone layer. Why is it important to you?

True of false efficiency compared the output work to the output force

How often should cardio exercises be performed? A. Never B. Three to five times a month C. Three to five times a week D. Three to five times a day

When the moon is directly opposite the sun in the sky, its phase is?

In what scenario would two objects have the most gravitational force pulling them together?

An object has a mass of 8.00 kg. What is the gravitational force on the object by the earth?

Which of the following best characterizes the free energy change ΔG for an endothermic reaction under physiological conditions? A. The sign of ΔG is positive B. The sign of ΔG is zero C. The sign of ΔG is negative D.

In a recent hockey game, one player (m=100kg) was moving at a velocity of 8 m/s when he ran into another player (m=300kg) who was at rest (v=0m/s). After the collision, the two players were stuck together (moving with the same velocity).

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova