A. The value of ‘g’ is less in water
B. Density of air is less than that of water
C. Of the viscous force in water
D. Of The surface tension of water
The rear view mirror of a motor vehicle is ________?
A. Concave
B. Plane
C. Convex
D. Biconcave
A. Provide insulation for preserving body heat
B. Provide striking surface to the wings for flying
C. Make the body surface waterproof
D. impart coloration for species as well as sex recognition
A. A device which when attached to an aircraft makes it invisible on the radar
B. A coating which reduces the visibility of an aircraft on radar
C. A Technology by which it is possible for the aircraft’s to spy in the enemy air-space
D. A technology by using which paratroopers can be dropped stealthily behind the enemy columns.
Bats can also fly in dark because they are capable of taking the help of _________?
A. Ultraviolet Waves
B. Ultrasonic Waves
C. Electromagnetic Waves
D. Special Retina
The Green House Effect is caused by an excess of ?
A. Carbon dioxide
B. Carbon monoxide
C. Carbon tetrachloride
D. None of the above
T.V. transmission cannot cover a very large area because
A. the strength of T.V. waves is very limited
B. picture cannot be transmitted clearly after a specific distance
C. the shape of the earth is spherical
D. the air is not a good conductor of light and sound/waves
The cow’s milk contains how much amount of water in terms of percentage?
A. 60%
B. 65%
C. 72%
D. 80%
A. Mesosphere
B. Troposphere
C. Stratosphere
D. ionosphere
An iceberg is floating in sea. How much of its mass will remain above the surface of water?
A. One tenth
B. One fifth
C. One fourth
D. One third