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A 5.3-cm-tall cylinderfloats in water with its axis perpendicular to the surface. Thelength of the cylinder above water is 1.4 cm. What is the cylinder's mass density (inkg/m3).
A battery of internal resistance r = 0.2 and emf E = 12.0 V. If the battery is connected to a device of resistance 6.0 (ohms), What is the electric power output of the battery
A centrifuge accelerates uniformly from rest to 15,000 rpm in 220 s. Through how many revolutions did it turn in this time
Most of us know intuitively that ina head-on collision between a large dump truck and a subcompactcar, you are better off being in the truck than in the car. what force does the seatbelt exert on the truck driver
two balls of radius 2.00 mm have a separation between their centers of 5.33 cm. the same electric charge is placed on
A 45 kg girl is standing on a 130 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.33 m/s relative to the plank.
A rectangular loop is located next to a long straight wire carrying a current of 30.0 A. What is the direction of the net force on the loop
A large helicopter is used to lift a heat pump to the roof of a new building. How much force must the air exert on the helicopter
question an electron moves in a 0.5nt b-field. if the radius of the circular orbit is 1cm what is its period angular
The density of water is 1000 kg/m3, while that of ice is 916.7 kg/m3. If a block of ice is placed in water, what volume fraction of the ice is below the surface
Two ice skaters, with masses of 40.0kg and 85.0kg , are at the center of a 60.0m -diameter circular rink. how long does the lighter skater take to reach the edge
An 83 kg fullback moving east with a speed of 5.4 m/s is tackled by a 96 kg opponent running west at 3.8 m/s, find the velocity of the players immediately after the tackle
As a new electrical engineer for the local power company, you are assigned the project of designing a generator of sinusoidal ac voltage with a maximum voltage of 120 {\rm V}. What is the minimum rotation rate of the coil so it will produce the req..
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