Question

D. Tick () the most appropriate answer.
1. The density of mercury is 13.6 gem in
CGS system. Its density in SI system is :
(a) 136 kgm-3 (b) 1360 kgm 3
(c) 13600 kgm 3
(d) no change in density
2. When a liquid is heated, it expands and its
level:
(a) rises upward
(b) moves downward
(c) remains same
(d) none of these
3. In order to find the density of a solid we
have to find its :
(a) mass and area
(b) weight and volume
(c) weight and area
(d) mass and volume
4. When the air cools, its density :
(a) increases
(b) decreases
(c) does not change (d) none of these
6. In coastal regions the density of air above
sea, during night is:
(a) more than that of land air
(b) less than that of land air
(c) same as that of land air
d) none of these
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Answer 1

Answer:

2.(b) Moves downward

4.(a) Increases

Explanation:

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