IGCSE Physics Paper-1: Specimen Questions with Answers 26 - 28 of 149

Question number: 26

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Question

4 divers are there, 2 in sea water and 2 in fresh water. Which diver will face lowest pressure known that sea water is denser than fresh water?

Divers are swimming in sea water and Fresh water.

Divers Are Swimming in Sea Water and Fresh Water.

Choices

Choice (4)Response

a.

D

b.

C

c.

A

d.

B

Answer

b.

Explanation

Pressure in liquid we can define as

Where ρ = Density of liquid

g = Gravitational acceleration

h = Height above the point at which we measure the pressure

In this case density of fresh water is rarer than the sea water and height of diver C is less.

Thus on diver C is there the lowest pressure.

Question number: 27

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Question

A road has a length of 60 km. A bus takes 20 min to travel between the two ends of the road. Find average speed of the bus?

Choices

Choice (4)Response

a.

150 km/h

b.

3.0 km/h

c.

1000 km/h

d.

2.5 km/h

Answer

b.

Explanation

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

Question number: 28

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Question

Which block has the lowest thermal capacity if same heat is applied and he temperature rise is given in the figure here?

Choices

Choice (4)Response

a.

Temperature rise is 6℃

Temperature Rise is 6℃

b.

Temperature rise is 9℃

Temperature Rise is 9℃

c.

Temperature rise is 3℃

Temperature Rise is 3℃

d.

180 C rising temperature of a block

180 C Rising Temperature of a Block

Answer

d.

Explanation

Here we show four block. Each of have different value of rise temperature. Now as we know that thermal capacity is a measurable physical quantity which can be define as “The ratio of heat added to an object to the resulting temperature change. ”

Then we can write block of 180 C rising temperature has highest rising temperature thus it has the lowest thermal capacity.

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