Which refers to the number of wavelengths that pass a fixed point in a second? A. wavelength

B. amplitude

C. frequency

D. compression

When an object is heated it contracts. a. true b. false

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

The amount of potential energy possessed by an elevated object is equal to what?