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Physics, 15.12.2020 14:20 lifeislove3251
A person prevents a 7,500N car with its brakes released from moving on a hill by pushing the car uphill with a force of 25,000N for 2 seconds. How much work is done?
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Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.
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A person prevents a 7,500N car with its brakes released from moving on a hill by pushing the car uph...
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