# IGCSE Physics Paper-1: Specimen Questions with Answers 18 - 21 of 149

## Question 18

### Question

MCQ▾

A tunnel has a length of 50 km. A jeep takes 300 sec to travel between the two ends of the tunnel. What is average speed of the jeep?

Choice (4)

a.

2.5 km/h

b.

16.6 km/h

c.

10 km/h

d.

150 km/h

c.

### Explanation

Here to find the average speed we can use the formula for this is given as,

Here we have time is 300 sec. Then we can write 5 min

## Question 19

### Question

MCQ▾

man walk and shows start and end of the walk. How long did the walk take? A Stopwatch Used to Time for Man Walk

Choice (4)

a.

45.7s

b.

47.0 s

c.

46.0s

d.

46.5s

c.

### Explanation

From above figure, we can note down the start time is 15.0 s and end time is 34.0 s. Therefore time for man walk is given as,

## Question 20

### Question

MCQ▾

Find most stable arrangement to hold a flask of liquid.

### Choices

Choice (4)

a. Flask Holding by Stand and Clamp

b. A Flask Holding by Stand and Clamp

c. A Flask Holding by Stand and Clamp More

d. A Flask Holding by Stand and Clamps

c.

### Explanation Most Stable Arrangement of Flask in Clamp

In all others choices, the flask is keeping at some height. Thus they are not so stable.

## Question 21

### Question

MCQ▾

Find average speed of molecules in 2 boxes if they are filled with air and one is on heater and the other is on bench. Two Metal Boxes Put on Heater and Bench

### Choices

Choice (4)

a.

Box X – Fast, Box Y – Slow

b.

Box X – Fast, Box Y – Zero

c.

Box X – Slow, Box Y – Fast

d.

Box X – Zero, Box Y – Fast

a.

### Explanation

Here box X is on heater and the box Y is on bench.

Then molecule in box x is moving faster than box Y because of heat. And so molecule in box Y is moving slowly.