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
Which one of the following statements about sound is NOT correct?
Sound travels at a speed slower than the speed of light
Sound waves are transverse waves
Sound waves are longitudinal waves
Sound travels faster in moist air than in dry air
Which of the following statements is NOT correct regarding the travel of Sound waves?
Sound waves can travel through water.
Sound waves can travel through the air.
Sound waves can travel through steel.
Sound waves can travel through a vacuum.
Which one of the following is NOT the unit of energy?
Joule
Watt-hr
Newton-metre
kg-metre/sec2
Which one of the following is the correct sequence of change in colors when a turmeric stain on white clothes is scrubbed by soap and then washed with water?
Yellow – pink – blue
Yellow – reddish-brown – yellow
Yellow – reddish-brown – blue
Yellow – blue – pink
The Sun appears reddish during sunrise and sunset. The phenomenon in optics which is responsible for this appearance of the Sun is
Reflection
Total internal reflection
Scattering
Interference
