# IGCSE Physics Paper-1: Specimen Questions with Answers 58 - 60 of 149

## Question 58

### Question

MCQ▾

In which state energy change is taking place in this graph?

Choice (4)

a.

P and S

b.

Q and R

c.

P and R

d.

Q and S

d.

### Explanation

In above figure we show the phase diagram

As we start to apply heat then molecule inside the solid are expand and phase change from solid to liquid. Again we increase temperature then again phase change from liquid to gas. So, at Q and S parts of the graph show a change of state taking place

## Question 59

### Question

MCQ▾

Why a person does not takes time to feel hot if he fills steel beaker with hot water?

### Choices

Choice (4)

a.

Steel is a poor conductor of heat.

b.

Steel is a good conductor of heat.

c.

Water is a poor conductor of heat.

d.

Question does not provide sufficient data or is vague

b.

### Explanation

Conductor means is allowed to flow something. We can also say that it allowed to passing something from heat. In this case it immediately heats up as steel is good conductor. Because steel glass is good conductor of heat, so it passing the heat of water to his hand very fast.

## Question 60

### Question

MCQ▾

Which form of energy is increasing as man dives or falls?

Choice (4)

a.

Strain

b.

Gravitational

c.

Chemical

d.

Kinetic