A 320 Hz tuning fork will produce a wave of what wavelength in air at 20 C traveling at 343 m/s?
1- 16m
2- 0.93m
3- 109,760m
4- 1.07m

Which object is most likely represented by a dot?

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?