How the weight of a body changes when it is brought to the mom"s surface from earth ?
It may or may not change.
It does not change.
Why does a thermos flask keep cold liquid cold and belt liquid hot
Because of a special inner lining in the thermos flask.
Because the thermos flask is double-walled and the spacee, inbetween contains air under pressure.
Because the walls of the thermos flask are very thick.
Because thermos flask is constructed in such a way that heat can neither leave the flask nor enter the flask.
What is the shape ofwater meniscus in a glass capillary tube ?
It is convex.
It is concave.
It is plane.
It is irregular.
Why does the moon not have an atmosphere ?
Because all its gases have been attracted by the sun.
Because of extreme variations in temperature on its surface.
Because the magnetosphere of the moon does not allow any gas to enter its atmosphere.
Because its gravitational pull is too weak to hold down gases.
Why cream separates out when milk is churned ?
Because cream particles are lighter than milk particles.
Because cream particles are heavier than milk particles -
Because the force of adhesion between the molecules of cream and milk is very weak.
Because of none of these reasons.
The energy possessed by a body, due to its motion, is known as
The energy of a body is
its capacity to do work.
the rate at which a body can do work.
that property of the body which determines the effectiveness of a given force which is applied on the body.
a measure of the motion,of the body.
Why does a stale egg float on water ?
Because a stale egg is lighter than a fresh egg.
Because certain bacteria grow in stale egg which help it to float on water.
Because there is a force of repulsion between water and thestale egg.
Because of certain changes in the shell of the stale egg.
Why is it easier to lift a heavy stone under water than in air ?,
Because the gravitational pull of the earth is less in water than in air.
Because water offers comparatively less resistance to the motion of the stone.
Because water cools the stone.
Because there is an apparent loss in weight, of the stone, in water.
Why water pipes are in danger of bursting in extremely cold weather ?
Because water pipes contract in extremely cold weather.
Because water freezes and hence expands.
Because water exerts greater pressure at lower temperatures.
Because short-range repulsive forces are produced between water' jand pipes.
1. World Geography -Test-01
2. World Geography -Test-02
3. World Geography -Test-03
4. Geography of India -Test-01
5. Geography of India -Test-02
6. Geography of India -Test-03
7. Geography of India -Test-04
8. Geography of India -Test-05
9. History of India - Test - 01
10. History of India - Test - 02
11. History of India - Test - 03
12. History of India - Test - 04
13. History of India - Test - 05
14. History of India - Test - 06
15. History of India - Test - 07
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