Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
If a 100 m long train is moving with a uniform velocity of 45 km/hr. Then find out the time taken by the train to cross a bridge of length 1 km.
58 s
68 s
78 s
88 s
When heat is given to a gas in an isobaric process
Work is done by gas
Internal energy of the gas increases
Both (a) and (b) is correct.
Neither (a) and (b) is correct.
If the disc of a siren containing 40 holes rotates at a constant speed of 360 rpm. Then the emitted sound is in unison with a tuning fork of frequency is;
240 Hz
360 Hz
120 Hz
90 Hz
Which one of the following phenomena CANNOT be exhibited by sound waves?
Reflection
Refraction
Interference
Polarization
The correct order for the speed of sound in different mediums in decreasing order is-
Copper-Air-Water
Glass-Copper-Air
Water-Air-Glass
Copper-Water-Hydrogen
