Ad: It Takes A Lot Of Work To Exist (Thermodynamics) Coffee Mug
No need to be a physics major or physicist to enjoy any of these gifts featuring the Carnot heat engine along with the wry truism saying "It Takes A Lot Of Work To Exist 24 Hours A Day 7 Days Per Week 365 Days Per Year". Specifically these gifts feature the second law of thermodynamics. Since any thermodynamic engine requires such a temperature difference it follows that useful work cannot be derived from an isolated system in equilibrium; there must always be an external energy source and a cold sink. Educational physics attitude gifts for all who work in the thermodynamic sense of the word! myPhysics
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