How can you tell whether one glass of water has more thermal energy than another, identical glass of water?

Question

I'll rtf

Answer 1

Thermal energy is determined by the temperature and the substance (some substances require more energy per kilogram to go up 1 degree than others). Since both contain water you can tell which has more thermal energy by simply using a thermometer. If you don't have a thermometer, you know they are exactly identical in amount of water they contain, and your a s****t you can try and measure if one liquid is higher in the class by like a tenth of a millimeter or something since the hotter liquid would have expanded in comparison to the cooler.

Answer 2

Use a thermometer.

Answer 3

If they are identical, then you won't.

Answer 4

Touch it.  

Answer 5

If both glasses are identical (I'm assuming you mean just the same amount of water but if they are completely identical they will have the same thermal energy) then the one with a greater temperature will have greater thermal energy.