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A 540-W space heater is designed for operation in Germany, where household electric outlets supply 230 V (rms) service. What is the power output of the heater when plugged into a 120-V (rms) outlet in a house in the United States? Ignore the effects of temperature on the heater's resistance.
Given a charged insulating sphere with radius R and charge density p (rho), calculate the electric potential inside and outside of sphere.
After two days, only one-quarter of a radioactive sample remains. What is the half life of the nuclei
A box at rest has the shape of a cube 3.5m on a side. This box is loaded onto the flat floor of a spaceship, What is the volume of the box as we observe it
The liquid-drop model of the atomic nucleus suggests high-energy oscillations of certain nuclei can split the nucleus into two unequal fragments plus a few neutrons, Calculate the electric potential energy (in electron volts) of two spherical fragm..
A reversible power cycle whose thermal efficiency is 40% receives 50 kJ by heat transfer from a hot reservoir at 600 K and rejects energy by heat transfer to a cold reservoir at temperature Tc. Determine the energy rejected in KJ
A crate with a weight of 50N rests on a horizontal surface. A person pulls horizontally on it with a force of 10N and it does not move. To start it moving, a second person pulls vertically upward on the crate. If the coefficient of static friction is..
A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. What is the mass of the meter stick
A circular wire loop of radius 8.1 m lies in a plane perpendicularto a uniform magnetic field of magnitude 0.4 T. In 0.1 s the wire is reshaped into a square but remains in the same plane.
A standing wave on a 77.4cm long string has three antinodes. If the string has linear mass density 3.92×10?5kg/m and tension 10.1N , what are the wave's frequency
A ski starts from rest and slides down a 21degree incline 75m long. what is the ski's speed at the base of the incline
A fugitive tries to hop on a freight train traveling at a constant speed of 4.8. What is the distance traveled to reach the box car
mass if it is placed at the following locations. Consult the figure 12.9 in the textbook, and assume a constant density through each of the interior regions, estimate the average density for each region
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