Development of the concept Of energy

Temperature rise resulting from compression

Temperature rise resulting from compression Anyone who has pumped up a bicycle tyre knows that the lower part of the pump barrel may become quite warm. Erroneously, this is often attributed to work done against friction. On reflection, however, one must come to the conclusion that the friction of an oiled plunger against the smooth barrel wall is …

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To measure the specific heat capacity of lead by the shot-tube method

To measure the specific heat capacity of lead by the shot-tube method Whilst, as its name implies, the term specific heat capacity is used in internal energy calculations where the energy transfer is by heat, it is also used when the energy transfer is by mechanical means, i.e., by doing work on a body. The experiment we …

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Heat capacity

Heat capacity The heat capacity of a body of any kind is defined as the heat required to raise its temperature by 1K. The SI unit of heat capacity is therefore the joule per kelvin (J/K). For the meaning and use of the kelvin in SI units and definitions see page 162.

Potential energy transferred to internal energy in a waterfall

Potential energy transferred to internal energy in a waterfall From the results of his experiments, Joule came to the conclusion that the water at the bottom of a waterfall ought to be slightly warmer than that at the top. At the top of the fall the water possesses potential energy, which becomes transferred to kinetic energy as it …

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