IGCSE Physics Paper-1: Specimen Questions with Answers 64 - 65 of 149

Question 64

Question

MCQ▾

A glass tank contains some water. The length QR = 5 cm, width RS = 3 cm and height of the water UR = 1 cm. Find volume of the water?

A Glass Tank Contain with Water with Side QR and RS

Choices

Choice (4)

a.

7

b.

3

c.

20

d.

15

Answer

d.

Explanation

Here in given figure, water inside the glass tank filled till height RU.

Now, to find the volume we must know about Length, breath and height.

Here length, width and height QR = 5 cm and RS = 3 cm and UR = 1 cm are given respectively.

Question 65

Question

MCQ▾

Which molecules escape when water evaporates?

Choices

Choice (4)

a.

the molecules at the surface with less energy than others

b.

the molecules at the bottom of the liquid with less energy than others

c.

the molecules at the surface with more energy than others

d.

the molecules at the bottom of the liquid with more energy than others

Answer

c.

Explanation

Here in the water evaporation the surface molecule which is having energy more than others are escape. Because in evaporation process takes place at temperature below boiling point, the molecules in the liquid have different energies and then as molecules are collide.

Then some achieve higher energy which are allowed to escape.

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