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?
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.