Raindrops make an angle q with the vertical when viewed through a moving train window (fig. 3-48). if the speed of the train is vt , what is the speed of the raindrops vd in the reference frame of the earth in which they are assumed to fall vertically?

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

The total amount of energy contained in an object

12. a body is a particular amount of matter. it can be a solid, liquid or gas. it can be described as existing in a. size and shape. b. motion and force c. time and space. d. location and movement.