In which units is heat typically measured?

Heat is typically measured in calories and joules, making this the correct choice.

Calories represent the amount of heat required to raise the temperature of 1 gram of water by 1 degree Celsius, while joules are the standard unit of energy in the International System of Units (SI). Both units are widely used in thermodynamics to quantify heat transfer and energy changes in physical processes. The relationship between these units allows for conversions and comparisons in various scientific fields, especially in chemistry and physics.

Other options include units that are not standard measurements for heat. For instance, pascals are units of pressure, while kelvins measure temperature. Likewise, watts are units of power, defined as energy per unit time, and BTUs are British Thermal Units that measure heat energy but do not coexist with kelvins in the context of direct heat measurement. Understanding the appropriate units for measuring heat is crucial for anyone working in fields related to energy and thermal management.