Apparatus developed by James Prescott Joule (1818-89) for determining the mechanical equivalent of heat. A vessel containing water, oil or mercury encloses vanes attached to a spindle. String wrapped around cylinder and drum. A weight falling against the scale rotates the spindle and blades. Raising and lowering the weight increases the temperature of the liquid. The energy consumed can be calculated from the rise in temperature and the distance travelled, Historic, digitally restored reproduction from a 19th century model, Record date not stated

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Creative#:

TPG34814100

Source:

達志影像

Authorization Type:

RF

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須由TPG 完整授權

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No

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No

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No

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