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A charged oil drop that has a mass of 5.40 x 10^-12 kg and carries 10 elementary charges is centered 50 mm below the center of an oppositely charged sphere that has a radius of 5.0 mm. Treat the drop as a particle. Part A What charge must the sphere be given therefore that the electric force it exerts on te drop causes the drop to float in the air for an instant? Express your answer to two important digits and include the appropriate units. q = Value Units
question a solid aluminum ingot weighs 92 n in air.a what is its volume?b the ingot is suspended from a rope and
A circuit consists of two 150.?k? resistors in series with an ideal 12.0?V battery. Calculate the potential drop across one of the resistors
Two automobiles, each of mass 1.500*10^3 kg, travel in the same direction along a straight road. find the translational kinetic energy of the center of mass
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.19 m2 and whose thickness is 9 mm. what is the percentage lost by the window
Two people carry a heavy electric motor by placing it on a light board 2.00 m long. One person lifts at one end with a force of 100 N, and the other lifts the opposite end with a force of 900 N.
Speedboat A negotiates a curve whose radius is 124m. Speedboat B negotiates a curve whose radius is 230m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
The mass of mars is 6.419 times 10 26 square kg and the mass of a single proton is 1.673 times 10 negative 27 square kg. assuming mars is made entirely of protons, how various protons would make up mars.
Absolute zero is only theoretical because
a uniform plank of length l leans against a vertical wall its head a distance h above the horizontal ground. if we let
If the lumberjack now trots toward the other end of the log with a speed of 2.7 m/s relative to the log, illustrate what is the lumberjack’s speed relative to the shore?
In1960 a Tampa, Florida, mother reportedly raised one end of a carthat had fallen onto her son when jack failed. how much work did her force do on the car
a 6.10times10-2kg cube of ice at an initial temperature of -18.0 c is placed in 0.880kg of water at 41.0 c in an
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