I heat up my sons milk in the microwave...
I use the same volume all the time and always punch in 42 seconds (on high) and his milk comes out the perfect temp every time.
However, sometimes he wants "mo milk" and I just want to give him a half bottle. So, I was filling up the coffee cup with half as much milk and I was cutting the micowave time from 42 seconds to 21 seconds. Seemed like a logical thing to try. But I am finding the milk to be way too hot. It does not seem directly proportional. (No I have not taken out a thermometer to prove it, but I'm pretty sure this is the truth)
My question is: How can I figure out how many seconds to heat my sons milk so that a half glass of milk is the same temperature as when I microwave a full glass?