Everyday Science
While dusting a carpet, we give a sudden jerk or beat it with a stick, because
Inertia of rest keeps the dust in its position and the dirt is removed by the movement of carpet away
Inertia of motion removes the dust
The jerk compensates for the force of adhesion between the dust and the carpet and the dust is removed
None of these
Inertia of rest keeps the dust in its position and the dirt is removed by the movement of carpet away
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Vitamin C is soluble inA. fat
B. water
C. ethers
D. phenols
The density of air in the atmosphere is
A. uniform
B. not uniform
C. zero
D. none of above
In the body, the weight of blood is about
A. 1/12th of body
B. 1/5th of body
C. 1/8th of body
D. 1/4th of body
Which substance is present in fuel?
A. Iron
B. Gold
C. Carbon
D. Copper
The energy stored in coal is
A. kinetic energy
B. potential energy
C. chemical energy
D. nuclear energy
A human breath per minute is
A. 16-30 times
B. 16-20 times
C. 15-20 times
D. 15-18 times
Symbol of Copper is
A. Ca
B. Cl
C. Co
D. Cu
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