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A metallic sphere has a charge of -9.4 nC. A negatively charged rod has a charge of -5.2 nC. The rod is then placed on the sphere and both objects reach an equilibrium state at which they have the same charge. How many electrons were transferred for this equilibrium state to be established?
At the equator, the earth's field is essentially horizontal; near the north pole, it is nearly vertical. What current should you pass through the coil, to produce a net field in the center of the tank that has a dip angle of 62
a sinusoidal sound wave is described by the displacement sxt sm coskx - omegat where sm 4.89 mum k 12.4 radm and
Calculate the period of a satellite orbiting the Moon, 94km above the Moon's surface. Ignore effects of the Earth
The flywheel in a car is a solid cylinder with a mass of 100 kg, a radius of 12 cm, and a length of 5.0 cm. What is the kinetic energy of the cylinder
the motor in a refrigerator has a power output of 200w. if the freezing compartment is at 270k and the outside air is
The top of a refrigerator has an area of 0.6m2. The height of the refrigerator is 180 cm. What volume does refrigerator occupy in cubic meters.
A concave lens has a focal length of -33 cm. Find the image distance and magnification that results when an object is placed 21cm in front of the lens.
Two charged dust particles exert a force of 8.5 x10-2 N on each other. What will be the force if they are moved so they are only one-seventh as far apart.
An aluminum cup contains 225 g of water and a 40 g copper stirrer, all at 27°C. Calculate the mass of the aluminum cup
An aluminum cylinder with radius 2.3cm and length 19cm is heated to 430 degrees C. Find the net power this cylinder radiates into a room
Compare the work that is done by Earth in stopping the comet to the 4.2 1015 J of energy that were released by the largest nuclear weapon ever built by calculating how many of these bombs would be equivalent to the energy of the comet.
A 10 m long wire carrying a current of 22 A makes an angle of 37 degrees with the Earth's magnetic field of 0.51 mT. What is the magnetic force of the wire
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