The energy of a photon was found to be
338 x 10-19 J. Planck's constant is 6.63 x 10-34 J·s.
Which color of light corresponds to this photon?
O violet
green
yellow
O red

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?