IGCSE Physics Paper-1: Specimen Questions with Answers 139 - 142 of 149

Question 139

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Question

MCQ▾

What are the correct units for the mass and amount of substance?

Choices

Choice (4)
a.
b.
c.
d.

Answer

d.

Explanation

  • The amount of substance is the number of discrete atomic-scale particles to divide with the Avogadro constant.
  • S. I Unit for the amount of substance is Mole (mol)
  • S. I Unit for the mass is Kilogram (kg).
  • These are international system of units which are accepted universally.

Question 140

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Question

MCQ▾

If the temperature of a 10kg of mass of material of specific heat capacity 200J rises from to , what would be the Heat received?

Choices

Choice (4)
a.3000J
b.1000J
c.1500J
d.2000J

Answer

b.

Explanation

i. e

Question 141

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Question

MCQ▾

From the table what is the movement of particles in solid gases and liquids?

Choices

Choice (4)
a.
b.MoverapidlyCannotmoveMove
c.
d.

Answer

a.

Explanation

  • Particles in a solid cannot move but they can vibrate because solid particles are tightly packed together.
  • Particles in liquids are close together but still the move.
  • Particles in a gas move very rapidly.
The image of Thermodynamics

The Image of Thermodynamics

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Question 142

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Question

MCQ▾

What is the pressure on a surface when a force of 48N acts on area of 6 m2?

Choices

Choice (4)
a.6 Pa
b.5 Pa
c.8 Pa
d.12 Pa

Answer

c.

Explanation

Pressure is defined as force per unit area.

The unit of pressure is Pascal.

Pressure = =

  • P =
  • P = 8 pa

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