Physics - Study Mode

[#1286] A spring is an example of which of these
Correct Answer

(B) Hooke's law

Explanation

Solution: A spring is an example of Hooke's law.

[#1287] A copper disc has a hole. If the disc is heated, the size of the hole
Correct Answer

(A) Increases

Explanation

Solution: When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter (sum of two radii) of the circular hole also increases.

[#1288] Which measurement describes the pressure of a gas?
Correct Answer

(A) 450 mm Hg

Explanation

Solution: 450 mm Hg denotes the air pressure.

[#1289] Tensional forces normally cause which one of the following?
Correct Answer

(A) Normal faults

Explanation

Solution: Tensional forces normally cause normal faults.

[#1290] Amount of water vapour in the atmosphere is measured in terms of
Correct Answer

(A) Humidity

Explanation

Solution: Humidity is the amount of water vapour in the air. The vapour content of air is measured with devices known as hygrometers. The measurements are usually expressed as specific humidity or percent relative humidity.