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A 45.0 kg girl is standing on a 162 kg plank. The plank, originally at rest, isfree 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 1.44 m/s relative to the plank.
a) What is her velocity relative to the surface of the ice?b) What is the velocity of the plank relative to the surface of the ice?
A particle with charge 94.5 nC is moving in the region where there is a uniform magnetic field of magnitude 0.45 T pointing in the negative x-direction. What is the magnetic field vector in vector notation
Five cubic feet of a gas at 90 pisg and 75 degree F are compressed to a volume of 2 cubic feet and the heated to a temperature of 250 degree F illustarte what is the new pressure? (General Ideal Gas Law)
The roof of the student dining hall at your college would be supported by high cross-braced wooden beams attached in the shape of an upside-down L. Each vertical beam is 10.0 ft high and 2.0 ft wide.
consider a uranium nucleus to be a sphere of radius r 7.4x10-15m with a charge of 92e distributed uniformly throughout
One mole of nickel (6E23 atoms) has a mass of 54 grams, and its density is 8.9 grams per cubic centimeter. You have a long thin bar of nickel, 2.0 m long, with a square cross section, 0.12 cm on the side.
A 500 \mu F capacitor is connected across a 1.25 H inductor. At a certain time, the charge on the capacitor is zero and the current is 0.347 A. What is the peak charge on the capacitor
Point charges of +1nc, +3nc and -3nc are located at each of three corners of an equilateral triangle with side length of 30cm. Find the net electrostatic fornce exerted on the +1nc charge.
A photon produces a proton-antiproton pair according to the reaction y ---> p+P. What is the minimum possible frequency of the photon
Four identical charges (+2uC each) are brought from infinity and fixed to a straight line. The charges are located .4 m apart. Determine the electric potential energy of this group.
a gymnast is performing a floor routine. In a tumbling run she spins through the air, How much time does this maneuver take
A light bulb operating at 110V draws 1.82A. Determine its resistance and the amount of power it draws
An astronomical telescope has
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