Find the magnitude of the net force produced by a
30-n force and a 20-n force in each of the follow-
ing cases: (a) both forces act in the same direction.
(b) the two act in opposite directions. (c) the two
forces act at right angles to each other.

What best describes a sonar wave? transverse and electromagnetic transverse and mechanical longitudinal and electromagnetic longitudinal and mechanical

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s. what is the wavelength?

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?