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
Dry ice is 4
Ice dust
Liquid hydrogen
Liquified hydrogen
Solid Carbon dioxide
At sunrise or sunset, the sun appears red. This is because
The sun is colder at sunrise or sunset
Scattering due to dust particles and air molecules causes this phenomenon
Refraction causes this phenomenon
Diffraction sends red rays to the earth at these times
If there was no atmosphere, then the length of the day on the earth will be
Increased
Decreased
Remain the same
Depend on the weather
Instruments can be protected from outside magnetic effects by surrounding them with
Glass shield
Iron shield
Rubber shield
Brass shield
Which among the following is the best insulator?
Wood
Glass
Dry air
Cloth
