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                Thermal 4
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            How hot do my hands get when I rub them together?
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            <h4>A student warms a metal temperature sensor by rubbing it in between their hands. Calculate the rise in temperature if the sensor is held with a force of 100 N, moved a distance of 4 cm per rub and rubbed 20 times.</h4>

<h4>mass of sensor = 10 g<br>
coefficient of dynamic friction of&nbsp; hands = 0.9<br>
coefficient of static friction of&nbsp; hands = 1.0<br>
Specific heat capacity sensor = 500 Jkg<sup>-1</sup>K<sup>-1</sup></h4>

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