Sound of frequency less than 20 Hz is known as …………….. sound.
A) infrasonic
B) ultrasonic
C) echo
D) reverberation
1 Answers
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The assets that can be converted into cash within a short period (i.e.,l year or less) are known as
The assets that can be converted into cash within a short period (i.e. 1 year or less) are known as. Current assets.
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A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength
Given: n = 1000 kHz = 106 Hz, va = 340 m/s, vw = 1486 m/s To find: Reflected wavelength (λR), Transmitted wavelength (λT), Formula: v = nλ Calculation: In different medium, frequency of sound wave remains same. From formula, Sound is...
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The wavelength of sound in air is 1.5 m and that in liquid is 2 m. If the velocity of sound in air is 330 m/s, the velocity of sound in liquid is
Correct option is: (B) 440 m/’s
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The characteristic of sound which distinguishes between a shrill sound and a growling sound is
Correct option is A) pitch
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Statement – I : If frequency of sound is less than 20 Hz, then they are called infrasonic sounds.
A) Both the statements I & II are true.
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Sound of frequency greater than 20 kHz is known as ………………..
B) ultrasonic
2 Answers 1 views
If the area is less, then the value of pressure A) less B) more
Correct option is B) more
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Q. 4. Show the following details with suitable index in the world map given below: (1) Area of high salinity in Atlantic Ocean (2) Area of less salinity near India (3) Dead Sea (4) Baltic Sea (5) Part of Red Sea having less salinity.
37000 32000 34000
2 Answers 20 views
Assertion . Molecular nitrogen is less reactive than molecular oxygen. Reason. The bond length of `N_(2)` is shorter than that of oxygen .
Correct Answer - a R is the correct explanation of A .
2 Answers 1 views
Assertion `(A): beta-` particles have greater penetrating power than `alpha-` rays but less than `gamma-`rays. Reason `(R) : beta-` particles are ligh
Correct Answer - A Refer Section
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