Question

which one has the most thermal energy?
a \tan ice cube in a glass of lemonade
b \ta pot of soup boiling on the stove
c \ta cup of hot coffee
d \ta bathtub full of warm water

Explanation:

Thermal energy depends on mass and temperature (and specific heat, but for water - based substances, specific heat is similar). An ice cube (a) has low mass and low temp. A cup of coffee (c) has small mass. A pot of soup (b) is boiling (high temp) but a bathtub (d) has a much larger mass of warm water. Even though the bathtub water is "warm" vs soup's "boiling", the huge mass of the bathtub water means its total thermal energy (mass × temp - related factor) is greater.

Answer:

d. a bathtub full of warm water