When a muscle contracts, it performs work. It does this by A) converting chemical energy to mechanical energy. B) converting mechanical energy into heat energy. C) converting mass into energy. D) creating energy.

Why is Saturn's moon Enceladus such an exciting place to send a mission?

Which of the following is not a unit of torque? O pound-foot 0 kilogram-newton Newton-meter O pound-inch

the law of reflection states that if the angle of incidence is 77 degrees the angle of reflection is

What are the factors caused by earthquakes that determine scientists use to describe earthquakes

Car A travels along a freeway at 110kmh-1 going east. Car B, travelling west at 120kmh-1 spins out of control and veers towards Car A (across the median strip) at an angle 30° off course. a. What is the velocity of Car B relative to Car A?

Which has greater potential energy, a book on the top shelf of a bookcase or a book on the bottom shelf? Why?

Fusion occurs with atoms of elements less massive than a. iron. b. helium. c. calcium. d. uranium.

Which describes what happens when fuel is ignited in a heat engine? A. Chemical energy is converted into thermal energy B. Thermal energy is converted into solar energy. C. Solar energy is converted into chemical energy D.

What happens during the intake and compression strokes of a four stroke engine?

Which of the following is a protection provided by the layers of Earth's atmosphere? (AKS4a DOK2) * A. Increasing the Sun's harmful UV rays reaching living things on Earth B.