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1979 Press Photo Helium refrigerant automobiles

Name: 1979 Press Photo Helium refrigerant automobiles
Brand: dfpz
SKU: dfpz34001
Price: 19.99 USD
Availability: InStock

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$19.99

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Description

Caption: Helium, the refrigerant needed for the new technology of superconductors, can be efficiently cooled to near absolute zero in Stirling heat engines like the one below. Mechanical power is used to compress the gas, causing it to heat. The heat is d

The front and back of this photograph are pictured below:

1979 Press Photo Helium refrigerant automobiles

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