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A simple model of the Earth includes a dense spherical core of radius 4200 km and a less dense spherical shell of thickness 2180 km (Note: the radius of the Earth is 6380 km and the mass of the Earth is 5.98 E 24 kg.) If the density of the core in this model is 10.0 g/cc, find:
(a) the density of the shell;
(b) the moment of inertia of Earth;
(c) the rotational kinetic energy of Earth;
(d) and the number of years this energy could supply the human race with all our energy needs. (We currently use about 5.00 x 1020 Joules of energy, in all forms, per year.)
Suppose that you hear a clap of thunder 18.4 s after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and the speed of light in air is 3.00 x10^8 m/s. How long are you from the lightning stroke.
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What is lemmings kinetic energy
That is, during the life of the loan, interest is paid on the full amount borrowed even though a portion of the principal has been paid back. Richard borrows $8,000 for a period of four years at an add-on interest rate of 11 percent. Illustrate wh..
If in Joule's paddlewheel experiment a block of mass 10 kg is allowed to fall through 22.5 meters and the mass of the water is 50 grams
A series circuit has a 50 Hz ac source, a 20 ohm resistor, a 0.6 H inductor, and a 40 ?F capacitor, the voltage amplitude of the source is closest to
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A cannonball is launched from ground level and lands at ground level. If it is launched with a speed of 76.2 m/s and stays in the air for 6.4 s, What angle was the cannon shot at
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What is magnitude of the change in the magnetic field
A heavy piece of hanging sculpture is suspended by a 90 cm-long, 5.0 g steel wire. When the wind blows hard, What is the mass of the sculpture
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