Which of the Following Correctly Describes How the Process of Gravitational

question 58

Multiple Choice

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.

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Definitions:

Porosity

The measure of how much of a rock is open space, which could be filled by liquids or gases.

Igneous Rocks

Geological formations that originate from the solidification and cooling of molten rock materials.

Porosity

The measure of empty spaces in a material, indicating its ability to hold fluid.

Permeability

The measure of a material's ability to allow fluids to pass through it, often related to the porosity and texture of the material.