# Which Mug Contains More Thermal Energy?

Based on the information given, Mug A contains 30 ml of coffee while Mug B contains 5 ml. Both mugs have the same temperature. To determine which mug contains more thermal energy, we need to consider the amount of coffee each mug holds.

## Determining Thermal Energy in Coffee Mugs

**Thermal energy is directly proportional to the mass of an object and its temperature.** In this case, the mass of the coffee in each mug plays a crucial role in determining the thermal energy of the system. Since the mugs have the same temperature, the amount of coffee (mass) becomes the deciding factor.

Given that Mug A contains a larger quantity of coffee (30 ml) compared to Mug B (5 ml), **Mug A has more thermal energy than Mug B.** The greater mass of coffee in Mug A results in higher thermal energy compared to Mug B, even though both mugs have the same temperature.