A 0.250-hp drill causes a dull 50.0-g steel bit to heat up rather than to deepen a
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A 0.250-hp drill causes a dull 50.0-g steel bit to heat up rather than to deepen a hole in a block of hard wood. Assuming that 75.0 percent of the friction-loss energy causes heating of the bit, by what amount will its temperature change in 20.0 s? For steel, c = 450 J/kg·°C.
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