lley A. Inside this cup there is a conical brass cup, shewn in sectionat the side, separated from the iron cup by a layer of cork towhich it is firmly secured; a second brass cup fits in this and iscarried round by the friction between the two when the axleis rotated. A large wooden pulley D is… … Fig. 85. cause the inner cup to turn and to raise the weight P; thework spent in overcoming this friction is measured as in theprevious experiment. The inner cup contains a known massof water and the friction heats this water. The heat producedcan be calculated in terms of the mass of water, the…
Heat · Light
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