Velocity of sound in air is 332 m/s. Its velocity in vacuum will be
(a) > 332 m/s
(b) = 332 m/s
(c) < 332 m/s
(d) meaningless.
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When we change feeble sound to loud sound we increase its
(b) amplitude
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Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 m s–1, calculate
Derivation of formula v = ν λ. (i) 340 = 256 λ λ = 1.33 m. (ii) 340 = ν (0.85) ...
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A body is vibrating 6000 times in one minute. If the velocity of sound in air is 360 m/s, find:
(a) Frequency of vibration in hertz Given, Number of vibration in one minute = 6000 Number of vibrations in one sec = 6000/ 60 =100Hz Therefore, Frequency, f = 100 Hz (b) Wavelength of the...
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Light enters from air into glass having refractive index 1.50. What is the speed of light in glass? The speed of light in vacuum is 3 x 108 ms-1.
Given,n=1.5 and the speed of light in vacuum, c = 3x 108 ms-1. We know that the refractive index is given by the expression n =c/v where c is the...
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A solid sphere falls with a terminal velocity of 20 m/s in air. If it is allowed to fall in vacuum,
(d) there will be no terminal velocity. Explanation: The term, terminal velocity is associated with a falling object in a fluid where the force of viscosity balances the weight and buoyancy force....
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The bulk modulus and tbe density of water are greater than those of air. With this much of information, we can say that velocity of sound in air
(d) cannot be compared with its value in water. EXPLANATION: The velocity of sound in a fluid is given as V =√(B/ρ) where B is the bulk modulus and ρ is the...
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A tuning fork sends sound waves in air. If the temperature of the air increases, which of the following parameters will change ?
(c) Wavelength . EXPLANATION: When the sound wave is being sent by a tuning fork, its displacement amplitude, frequency and the time period will remain the same even if the temperature changes....
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A light wave can travel (a) in vacuum (b) in vacuum only (c) in a material medium
(a) in vacuum (c) in a material medium EXPLANATION: The light is an electromagnetic wave that can travel in a vacuum as well as in a transparent material medium.
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The speeds of red light and yellow light are exactly same (a) in vacuum but not in air
(a) in vacuum but not in air
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Which one of the following statements is not correct? (a) The velocity of sound in air increases with the increase of temperature
(c) The velocity of sound in air is determined by the air itself and is not dependent upon the amplitude, frequency, or wavelength of the sound. The velocity of sound...
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