Physics - Study Mode

[#211] Which of the following is not an aerosol?
Correct Answer

(A) Mud

Explanation

Solution: Some of the examples of aerosols are fog, dust, smoke, geyser steam etc. They can be natural or anthropogenic. Mud is not an aerosol.

[#212] What is the process of conversion of solid state directly to gaseous state called?
Correct Answer

(C) Sublimation

Explanation

Solution: Sublimation is the process of transformation directly from the solid phase to the gaseous phase, without passing through an intermediate liquid phase.

[#213] Solids have definite shapes.This is because
Correct Answer

(B) The forces of cohesion are very large

Explanation

Solution: Any matter that is a solid has a definite shape and a definite volume. The molecules in a solid are in fixed positions and are close together. Although the molecules can still vibrate, they cannot move from one part of the solid to another part. As a result, a solid does not easily change its shape or its volume.

[#214] The amount of matter in a ball of steel is its :
Correct Answer

(B) Mass

Explanation

Solution: The amount of matter in a ball of steel is its mass.

[#215] Sound travels at the fastest speed in
Correct Answer

(A) steel

Explanation

Solution: Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.