Question on: JAMB Physics - 2020
In the study of Physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two elements?
A
Temperature is a measure of the average kinetic energy of the molecules of a substance
B
Heat is a measure of the total kinetic energy of the molecules in a system
C
Different materials require different amounts of heat to cause a given change in temperature
D
All of the above
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Correct Option: D
Here's why each option is correct:
* **A.** Temperature is a measure of the average kinetic energy of the molecules of a substance. This is the fundamental definition of temperature at the molecular level. Higher average kinetic energy means higher temperature.
* **B.** Heat is a measure of the total kinetic energy of the molecules in a system. Heat represents the total energy of all the molecules.
* **C.** Different materials require different amounts of heat to cause a given change in temperature. This is because different materials have different specific heat capacities. Specific heat capacity is the amount of heat needed to raise the temperature of a unit mass of a substance by one degree.
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