As a helium-filled dirigible rises in the atmosphere, the buoyancy force is expected to
A) increase.
B) decrease.
C) remain constant.

Question

Quizplus · Accepted Answer

As a helium-filled dirigible rises in the atmosphere, the air density decreases with altitude. Since buoyancy force depends on the density of the surrounding fluid (in this case, air), the buoyancy force exerted on the dirigible decreases as it rises.

As a Helium-Filled Dirigible Rises in the Atmosphere, the Buoyancy