The Laplace’s correction in the expression for velocity of sound given by Newton is needed because sound waves
(A) are longitudinal
(B) propagate isothermally
(C) propagate adiabatically
(D) are of long wavelength
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The `K_beta` X-ray of argon has a wavelength of 0.36 nm. The minimum energy needed to ionize an argon atom is 16 eV. Find the energy needed to knock o
Correct Answer - `3.47 keV`
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A galvanometer has a resistance of `30Omega` and a current of 2 mA is needed to give full scale deflection. What is the resistance needed and how is i
Correct Answer - (i) `(30)/(149)Omega` in parallel, (ii) `70Omega` in series
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What is then special about Newton’s first law if it is derivable from Newton’s second law?
1. Newton’s first law shows an equivalence between the ‘state of rest’ and ‘state of uniform motion along a straight line.’ 2. Newton’s first law of motion defines force as a...
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State Newton’s formula for velocity of sound.
Newton’s formula for velocity of sound : i. Sound wave travels through a medium in the form of compression and rarefaction. At compression, the density of medium is greater while at...
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A force of 5 newton acts on a body of weight 9.80 newton. What is the acceleration produced in m/s^2?
Correct option is: (C) 5.00 Given, F = 5N W = 9.80 a = ? W = mg \(9.80 = m \times 9.8\) m = 1 kg F = ma \(5 = 1 \times a\) \(a = 5 m/s^2\)
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A force of 5 newton acts on a body of weight 9.80 newton. What is the acceleration produced in m/s^2?
2 Answers
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The velocity of sound in air at 27 °C is 340 m/s. Calculate the velocity of sound in air at 127 °C.
Given: T1 = 27 °C = 27 + 273 = 300 K, v1 = 340 m/s, T2 = 127 °C = 127 + 273 = 400 K To find: Velocity (v2) Formula: \(\frac{v_1}{v_2}=\sqrt{\frac{T_1}{T_2}}\) Calculation: From formula, v2 = v1 \(\sqrt{\frac{T_2}{T_1}}\) = 340, \(\sqrt{\frac{400}{300}}\) =...
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A series of ocean waves, each 5.0 m from crest to crest, moving past the observer at a rate of 2 waves per second have wave velocity
Correct option is: (D) 10.0 m/s
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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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If the velocity of sound in hydrogen is 1248 m/s, the velocity of sound in oxygen is (A) 1248 m/s (B) 624 m/s
Correct option is: (C) 312 m/s
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