The intensity of sound increases at night due to [CPMT 2000]

1.	The intensity of sound increases at night due to [CPMT 2000]
A.	Increase in density of air
B.	Decreases in density of air
C.	0.4m
D.	None of these
Answer» B. Decreases in density of air

Discussion

No Comment Found

Related MCQs

A wave motion has the function \[y={{a}_{0}}\sin (\omega \,t-kx)\]. The graph in figure shows how the displacement y at a fixed point varies with time t. Which one of the labelled points shows a displacement equal to that at the position \[x=\frac{\pi }{2k}\] at time t = 0
The equation \[y=A{{\cos }^{2}}\left( 2\pi \ nt-2\pi \frac{x}{\lambda } \right)\] represents a wave with [KCET 2002]
The equation of displacement of two waves are given as \[{{y}_{1}}=10\sin \left( 3\pi t+\frac{\pi }{3} \right)\]; \[{{y}_{2}}=5(\sin 3\pi t+\sqrt{3}\cos 3\pi t)\]. Then what is the ratio of their amplitudes [AIIMS 1997; Haryana PMT 2000]
The correct graph between the frequency n and square root of density (r) of a wire, keeping its length, radius and tension constant, is
Which of the following curves represents correctly the oscillation given by \[y={{y}_{0}}\sin (\omega \,t-\varphi )\], where \[0
The figure shows four progressive waves A, B, C, and D with their phases expressed with respect to the wave A. It can be concluded from the figure that [CPMT 1986, 88]
The diagram below shows an instantaneous position of a string as a transverse progressive wave travels along it from left to right Which one of the following correctly shows the direction of the velocity of the points 1, 2 and 3 on the string
Two tuning forks P and Q are vibrated together. The number of beats produced are represented by the straight line OA in the following graph. After loading Q with wax again these are vibrated together and the beats produced are represented by the line OB. If the frequency of P is 341Hz, the frequency of Q will be
An observer is moving towards the stationary source of sound, then [MH CET 2001]
A whistle revolves in a circle with an angular speed of 20 rad/sec using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz, then what is the minimum frequency heard by an observer, which is far away from the centre in the same plane? (v = 340 m/s) [CBSE PMT 2002]

The intensity of sound increases at night due to [CPMT 2000]

Discussion

No Comment Found

Related MCQs

Reply to Comment