A laser beam shines straight up onto a flat black foil with
A laser beam shines straight up onto a flat, black foil with a mass of 23.0 ?g. What laser power is needed to levitate the foil? (Answer in units W).
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a 75 cm diameter horizontal pipe gradually narrows to 6 cm when water flows through this pipe at a certain rate the
a 0283-m-thick sheet of ice covers a lake the air temperature at the ice surface is -177 degc in 310 minutes the ice
a wire of length l carries a current i in the positive direction of an x axis through a magnetic field byj hat bz k
a small object with a mass of 330 mg carries a charge of 250 nc and is suspended by a thread between the vertical
a laser beam shines straight up onto a flat black foil with a mass of 230 g what laser power is needed to levitate the
a 52g firecracker is at rest at the origin when it explodes into three pieces the first with mass 15g moves along the
in a hydroelectric installation a turbine delivers 1500 hp to a generator which in turn converts 750 of the mechanical
q1 an art dealers client is willing to buy the painting sunplant at 50000 the dealer can buy the painting today for
a fisherman notices that his boat is moving up and down periodically without any horizontal motion owing to waves on
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