Which is the correct formula for finding the frequency of an electromagnetic wave? f = c – lambda
f = StartFraction lambda over c EndFraction.
f = lambda + c
f = StartFraction c over lambda EndFraction.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Carmen is load furniture and boxes onto a moving truck. she picks up boxes of her things, places them on a cart, and pushes the cart to the moving van. which term best describes the type of force carmen uses? a. contact b. friction c. gravity d. noncontact

Asign is hung between two cables as illustrated below. if the sign weighs 350 n, what is the tension (in n) in each cable?