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A 62 g hollow copper cylinder is 10 cm long and has an inner diameter of 1.0 cm. The current density along the length of the cylinder is 150,000 A/m^2. What is the current in the cylinder?
A 0.550 {\rm kg} glider on an air track is attached to the end of an ideal spring with force constant 458 {\rm N}/{\rm m}; Compute the total mechanical energy of the glider at any point in its motion
A typical household uses 500 kwh (kilo-watt-hours note: the kwh works out to be units of energy if you think about it) of energy in one month. Find how much mass is converted to produce this
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. (a) What is the magnitude and sign of the excess charge.
a solid uniform disk of radius 0.250 m and mass 60.5 kg rolls down a ramp of length 5.20 m that makes an angle of
The resonance frequency of an RLC circuit is1100 Hz. What is the resonance frequency if theinductance L is doubled? What is the resonance frequency if hecapacitance C is doubled?
An alpha particle (the nucleus of a helium atom, with charge +2e and a mass four times that of a proton), What is the speed of the antiproton when the particles are 1.1nm apart
Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century. In 41 centuries, what is the total (in hours) of the daily increases in time..
a flat sheet ofcrown glasshas a thickness of 2.2cm. it is on top of a flat sheet of crystalline quartz that has a
An optometrist prescribes contact lenses that have a focal length of 50.0cm. (a) Are the lenses converging or diverging? (b) Is the person who wears them near-sighted or far-sighted?
an astronaut weighs 1000N on the surface of the earth(radius = 6.38*10^6m) what is the weight of the astronaut at the elevation of 620 km above the earth's surface
A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. What is the difference in temperature between the inner and outer sufaces of the aluminum bottom of the pot
The siren in an ambulance has a frequency (according to you) of 1095 Hz as it moves toward you at speed v. What is the final speed v of the siren
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