Apparatus for showing the mechanical equivalent of heat, 1884.
4 0 c m
 
33cm
actual image size: 25cm x 32cm

Apparatus for showing the mechanical equivalent of heat, 1884.

© Science Museum / Science & Society Picture Library

Description

This device, invented by the physicist Charles Vernon Boys (1855-1944), gives an accurate figure for the mechanical equivalent of heat. The amount of heat energy needed to raise the temperature of 1kg (2.2lb) of water by one degree is one kilocalorie, or about 4000 joules. This is the same amount of mechanical energy needed to lift a four tonne weight by 10cm.
 

Image Ref.

10325941
 

buy a print

Select size
 
Select finish
 
How many prints?
 
£20.00
 

buy a framed print

buy a canvas

buy a framed canvas