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A bucket filled with water has a mass of 79 kilogram and is attached to a rope that is wound around a .065 meter radius cylinder. A crank with a turning radius of .10 meter is attached to the end of the cylinder. Find what minimum force directed perpendicular to the crank handle is required to raise the bucket?
(N)
A recording engineer works in a soundproofed room that is 45 dB quieter than the outside. If the sound intensity in the room is 1.30 x10-10 W/m2, what is the intensity outside.
Two vehicles, A and B, approach a right angle intersection and then collide. After the collision, they become entangled. Find the final velocity of the wreck
A conducting sphere 10cm in diameter is first charged and left isolated at a potential of 100volts. calculate the charge (in coulombs) on the sphere and on the capacitor after being connected
An air puck of mass m1 = 0.23 kg is tied to a string and allowed to revolve in a circle of radius R = 1.3 m on a frictionless horizontal table.
a 5.0 -thick layer of oil n1.46 is sandwiched between a 1.5 -thick sheet of glass and a 2.3 -thick sheet of polystyrene
During an electrostatic field experiment, you assume that the electric field lines are in the plane of the paper, What condition determines the accuracy of this assumption
A 58 kW radio station broadcasts its signal uniformly in all directions. What is the average intensity of its signal at a distance of 290 m from the antenna
what is the kinetic energy of a ball of mass 16.1 kg at the apex (highest point) of its trajectory, if it is thrown with an initial speed of 45 mph
A person looks horizontally at the edge of a swimming pool. If its length is 5.00m, and the pool is filled to the surface, to what depth (in m) could observer see? For water is 1.33).
When an 78.3-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.08 x 103 J. By how much does the potential energy of a 19.5-kg child increase when the child climbs a normal st..
a record is turning at the rate of 33 r.p.m. when the 45 r.p.m. button is pressed. what is the angular acclereration of the record
Compare teh parameters for H (for magnetostatics) and D (for electrostatics). In your discussion include comments on their origin, physical interpretation, connection to "free" quantities, and their usefulness in real world applications. There should..
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