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251.

Define the density of objects.

Answer»

Density of a substance is defined as the mass of the substance contained in unit volume

Density (D) = \(\frac{mass (m)}{volume (v)}\)

252.

How will you determine the volume of a liquid?

Answer»

By using measuring cylinder.

253.

(a) Take an iron block and a wooden block of same mass (say 1 kg each). Measure their volume. Which one of them has more volume and occupies more volume? (b) Take an iron block and a wooden block of same size. Weigh them and measure their mass. Which one of them has more mass?

Answer»

(a) Wooden block has more volume and occupies more volume. (As the molecules of wood are loosely packed) 

(b) Iron block has more mass. (In iron block, molecules are closely packed).

254.

Distinguish between the volume of liquid and capacity of a container.

Answer»
S. NoVolume of liquidCapacity of container
1.Volume is the amount of space taken up by a liquidcapacity is the measure of an object ability to hold a substance like solid, liquid or gas
2.it is measured in cubic unitsIt is measured in litres, gallons, pounds etc.
3.It is calculated by multiplying the length, width and height of an object.it's measurement is cc or ml.

255.

What is capacity of a container?

Answer»

The volume of liquid which a container can hold is called its capacity.

256.

The unit of volume is _____(a) m3(b) m3(c) cm3(d) km

Answer»

Correct answer is (a) m3

257.

The SI unit of speed is _____(a) m/s2(b) m/s(c) km/h(d) m2/s

Answer»

Correct answer is (a) m/s2

258.

The maximum volume of liquid that a continer can hold is _____(a) area(b) volume(c) capacity(d) density

Answer»

Correct answer is (c) capacity

259.

Physical quantities are classified into _____ type(a) three(b) two(c) four(d) none of the above

Answer»

Correct answer is (b) two

260.

The largest distance between the earth and the sun is called as _____ position. (a) normal (b) perihelion (c) aphelion (d) none of the above

Answer»

Correct answer is (c) aphelion