Determine the mechanical energy of this object: a 1-kg pendulum has a speed of 2 m/s at a height of 1 meter.

A. 9.8 J

B. 11.8 J

C. 2 J

D. 7.8 J

Why does the sun appear to rise in the east and set in the west every day?

Explain how electron microscopes work and why some scientists might prefer to use electron microscopes instead of light microscopes.

What type of wave is sound? longitudinal light surface transversal

What can accurately be said about a resultant wave that displays both reinforcement and interference? A. Molecules remain in their normal positions at spots of reinforcement. B.

Only two horizontal forces act on a 3.0 kg body that can move over a frictionless floor. One force is 9.0 N, acting due east, and the other is 8.0 N, acting 62° north of west. What is the magnitude of the body's acceleration?

What type of rock forms due to heating and cooling?

If a body of mass 10 kg is pushed with a force of 15N, then the acceleration of the body is

Describe the position of earth moon and sun during a solar eclipse

What is an output force? a. the force a person applies to a simple machine b. the force a simple machine applies to an object c. the net force on a system d. the applied force on a system

Would iron and carbon from metallic bonds