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how does an electrostatic generator operate? !
a motor drives a belt moving through magnets.
an electric motor causes electricity to flow through a moving belt.
electrons are stripped off a wool pad.
electrons are transferred to a metallic sphere.

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity