Speed of sound is more if density of medium is less. Sound travels faster in water than in air though the density of air is less. Why?
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One can hear people talking in next room but can’t see them. Why?
What is diffraction of sound?
How does an ear trumpet help to hear clearly? Note: (Conditions) 1) Like Our Page on Facebook 2) Share this Question on Facebook (Winner will be provided Rs 50 NTC/NCELL recharge card)
A progressive wave has frequency of 40 Hz and velocity 50 m/s. Find the phase difference between two points on the wave at a separation of 40 cm.
Which star has a long life, a small star or a big star? Why?
What is standing wave?
State superposition principle of wave.
The equation of a wave is given by Y = 0.3 sin (2t – 0.5x) Where Y is in cm and t is in seconds. Find the wavelength, frequency and amplitude of the wave.
Uranium nucleus has more binding energy than Iron nucleus but Uranium nucleus is less stable than Iron nucleus. Why?