absorption refrigeration industrial waste heat

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Waste heat can be used to cool things

Some refrigerators can run on heat instead of mainly using mechanical power. This means heat from factories that would otherwise be wasted can be used to provide cooling.

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The Moon is moving farther from Earth

~38 mm/year

Laser measurements show that the Moon moves about 38 millimeters farther from Earth each year. Earth's days are lengthening as tidal friction transfers angular momentum from Earth's rotation to the Moon's orbit.

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Acidic foods are easier to can safely

Acidic fruits can often be safely canned with boiling water. Less acidic foods, such as vegetables and meat, need the higher temperatures of pressure canning. The food's acidity determines how much heat is needed.

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