Physics - Study Mode

[#646] Least audible sound for most of the human ear is :
Correct Answer

(B) 0.0002 µ bar

Explanation

Solution: Least audible sound for most of the human ear is 0.0002 µ bar.

[#647] Hertz is a unit for measuring
Correct Answer

(B) Frequency of waves

Explanation

Solution: Frequency is the rate at which current changes direction per second. It is measured in hertz (Hz), an international unit of measure where 1 hertz is equal to 1 cycle per second.

[#648] Hertz is the SI unit of
Correct Answer

(D) Frequency

Explanation

Solution: Hertz is the SI unit of frequency.

[#649] The velocity of the sound is highest in
Correct Answer

(A) Metal

Explanation

Solution: The velocity of the sound is highest in metal.

[#650] The ordinary and maximum tolerance limit of sound by human being is
Correct Answer

(B) 60 db to 80 db (decibel)

Explanation

Solution: The ordinary and maximum tolerance limit of sound by human being is 60 db to 80 db (decibel).