Hi Doug, just a quick respone fo rnow. You say ” .. you can’t even slow down the rate of cooling (such as the surface cooling at night) without adding thermal energy .. “. SO a thermos flask has a built-in heater??!!
Pete r
Hi Doug, just a quick respone fo rnow. You say ” .. you can’t even slow down the rate of cooling (such as the surface cooling at night) without adding thermal energy .. “. SO a thermos flask has a built-in heater??!!
Pete r