Which of the following correctly describes how the process of gravitational contraction can make a star hot?
A)Gravitational contraction involves nuclear fusion,which generates a lot of heat.
B)When a star contracts in size,gravitational potential energy is converted to thermal energy.
C)Heat is generated when gravity contracts,because gravity is an inverse square law force.
D)Gravitational contraction involves the generation of heat by chemical reactions,much like the burning of coal.

Question

Quizplus · Accepted Answer

Gravitational contraction is the process by which a cloud of gas and dust collapses due to its own gravity, causing it to become denser and hotter. As the cloud becomes smaller, its gravitational potential energy is converted into thermal energy, increasing the temperature of the gas and dust. This process continues until the center of the cloud becomes hot and dense enough for nuclear fusion to begin, which then generates even more heat. Therefore, option B is the correct choice as it accurately describes how gravitational contraction can make a star hot.

Which of the Following Correctly Describes How the Process of Gravitational