Two small spheres each having mass m kg and charge q coulomb are suspended from a point by insulating threads each L m log but of negligible mass. If theta is the angle each string makes with the vertical when equilibrium has been attained. Show that q^2 = (4mgL^2 sin^2theta tan(theta)) 4(pi)ɛo.​

The plum pudding model of the atom states that ?

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

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