(If yes please do give the formula & derivation, THANK YOU)
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How are the wavelength and frequency of a sound wave related to its speed?
Speed = Wavelength x frequency V = λ × ν
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Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium
f = 220 Hz, V = 440 m/s λ = f = 440 /220 = 2 m
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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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Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher
Yes, it is true. There may be displacement in the absence of force. We know that, F =...
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An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?
The object is in motion, so its energy = kinetic energy = 1 /2 mv2 The kinetic energy of the object, when it comes to rest = 0. Work done on object...
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A motorcyclist drives from A to B with a uniform speed of 30 km h–1 and returns back with a speed of 20 km h^–1. Find its average speed
Let AB = x, So t 1=x /30, and t2 = x /20 Total time = t1 + t2 = 5x / 60 h. Average speed for entire journeyTotal distance /Total...
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Obtain a relation for the distance travelled by an object moving with a uniform acceleration in the interval between 4th and 5th seconds.
Using the equation of motion ...
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For sound waves, the Doppler formula for frequency shift differs slightly between the two situations:
No Sound waves can propagate only through a medium. The two given situations are not scientifically identical because the motion of an observer relative to a medium is different in the...
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An object may have (a) varying speed without having varying velocity (b) varying velocity without having varying speed
(b) varying velocity without having varying speed (d) nonzero acceleration without having varying speed. Explanation: Velocity and acceleration are vector quantities that can be changed by changing direction only (keeping magnitude constant).
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An object is released from rest. The time it takes to fall through a distance h and the speed of the object,
(a) the measured times are same (b) the measured speeds are same EXPLANATION: The time of fall t = √(2h/g) and the final speed v=√(2gh). The time period of the pendulum clock T=2π√(l/g)....
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