How do bones and muscles work together to allow movement?
a. muscle pairs work together (contracting and relaxing). tendons attached to the muscles (and the bones) pull on the bones, which causes body movement.
b. bones and muscles do not work together. they are each part of their own seperate body system and do not interact.
c. ligaments pull on bones, causing them to move.

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?