One morning you discover that a tire on your auto is in need of air. As you add air to the tire, which of the following statements is true?
A) The density of the air in the tire gets smaller.
B) The pressure of the air in the tire increases.
C) The number of atoms of air in the tire stays the same.
D) All of the statements are true.

Question

Quizplus · Accepted Answer

When air is added to a tire, the volume of the tire remains the same while the number of air molecules inside the tire increases. This leads to an increase in pressure, as there are now more molecules colliding with the tire walls, creating a greater force per unit area. The density of the air inside the tire remains the same, as the mass and volume of the air both increase proportionally. Therefore, only statement B is true.

One Morning You Discover That a Tire on Your Auto