Which equation would you need to rearrange to calculate the specific heat of an object

Which sound characteristic is not affected by the relative motion of an object

Current from a charged capacitor lights a bulb. as time goes on the brightness of the

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?