Turns of wire needed in a circular coil
A magnetic field increases from 0 to 0.30T in 1.5 seconds. How many turns of wire are needed in a circular coil 15cm in diameter to produce an induced emf of 0.80 volt?
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The polar ice caps contain about 2.3 * 10^19 kg of ice. This mass contributes essentially nothing to the Earth's moment of inertia because it's located near the poles. Estimate the change in the length of one day if the caps were to melt and redis
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Interstellar space has a magnetic field on the order of 0.1 nT. Matter in this space is mainly Hydrogen atoms (about 1 per cubic centimeter) moving with speeds of about 1 km/s. Compare the energy in the magnetic field to the Kinetic Energy of the
Koonce Company manufactures private-label small electronic products, such as alarm clocks, calculators, kitchen timers, stopwatches, and automatic pencil sharpeners.
Near the bottom of the spring, the spring only supports the mass of the mass hanger (50 g). Assuming its k value is 12 N/m, how much does it want to stretch?
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Water at 33.0 °C is sprayed onto 0.156 kg of molten gold at 1063 °C (its melting point). The water boils away, forming steam at 100.0 °C and leaving solid gold at 1063 °C. What is the minimum mass of water that must be used?
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