Practice MCQ Questions and answers on Physics-GK

At high altitudes, oxygen molecules are further apart because there is less pressure to "push" them together. This effectively means there are fewer oxygen molecules in the same volume of air as we inhale.

Hydraulic brakes work on the principle of Pascal's law.

Hydraulic brakes work on the principle of Pascal's law.

The hydraulic brakes in automobiles works on the principle of Pascal's law.

Air moves from the region where the air pressure is high to the region where the pressure is low.

The hydraulic brakes used in automobiles is a direct application of Pascal's law.

The pressure exerted by a static fluid depends only upon the depth of the fluid, the density of the fluid, and the acceleration of gravity. Static fluid pressure does not depend on the shape, total mass, or surface area of the liquid.

Scuba diving players must have the knowledge of Pascal's law.

Air pressure is usually highest when the air is cool and moist.

Evaporation is the process that allows water to enter into the atmosphere. Sunlight turns liquid water into water vapor which then rises higher into the atmosphere and forms into clouds. Plants, too, help water get into the atmosphere through a process called transpiration.