MEDIUM
7th CBSE
IMPORTANT
Earn 100

The SI unit of density is _____.

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Important Questions on Measurements

MEDIUM
7th CBSE
IMPORTANT

_____ is constant anywhere in the universe.

MEDIUM
7th CBSE
IMPORTANT

1 quintal is equal to _____.

MEDIUM
7th CBSE
IMPORTANT

The measuring cylinder is used to measure the _____of a liquid.

MEDIUM
7th CBSE
IMPORTANT
Column A Column B
(A) Liquid displaced by a solid (a) 105 g
(B) 1 quintal (b) 109 mg
(C) 1 tonne (c) Unit of pressure
(D) kg wt m-2 (d) Volume of the solid

Choose the option for the correct match.

MEDIUM
7th CBSE
IMPORTANT

Write the following steps in a sequential order to show that the volume of a liquid displaced by a solid, which is insoluble and completely immersed in a liquid, increases with increase in the volume of the solid.

(a) The displaced liquid is collected in a beaker and its volume is measured with the help of a measuring cylinder.

(b) Different objects, such as glass, stone, etc., of different volumes are immersed in different liquids, such as water, kerosene, etc.

(c) The phenomenon is observed at different places and different times.

(d) It is observed that the volume of displaced liquid increases as the volume of the solid increases.

MEDIUM
7th CBSE
IMPORTANT

The unit of force in SI system is 1 newton=1 kg m s-2. In CGS system its unit is dyne and it is given as 1 dyne=1 g cm s-2. Arrange the following steps in a sequential order to relate the SI unit and CGS unit of force.

(a) Write the conversion of kg and m, into g and cm respectively.

(b) Substitute the conversion in 1 newton=1 kg m s-2.

(c) Write the relation between 1 newton and 1 dyne.

(d) Write in place of 1 g cm s-2 as 1 dyne.

 

MEDIUM
7th CBSE
IMPORTANT

Which of the following statements is correct?

MEDIUM
7th CBSE
IMPORTANT

The mass of a density bottle when it is filled with a liquid of density 3000 kg m-3 is 400 g and the mass of the bottle when it is filled with water is 200 g. The mass of the empty density bottle is _____ g.