If you release a weight and allow it to fall under the influence of gravity alone, what kind of motion will it experience?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

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?