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Let the length of the tunnel be ‘x’ meter. Speed = 54 × (5/18) m/sec = 15 m/sec Time = 1 minute = 60 seconds. Let the length of the tunnel be x metres. Then, (600 + x)/60 = 15 =>(600 + x) = 900 => x = 300 m
Twinkling of the Stars is due to the phenomenon of
Which of the following is a vector quantity?
In which material does sound travel the fastest?
Which of the following is/are NOT scalar quantities?
Which medium cannot propagate sound waves?
With reference to the types of electromagnetic waves, consider the following statements:
(I) Radio waves have the highest wavelength range among ...
______ is an important metal to form amalgam.
The time period of a second’s pendulum is –
What is the speed of light in air?
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