Thermal physics -igcse

Which two of these are included in the term 'fluids'?

• solids

• liquids

• gases

• metals

Which of these is not a change of state?

• freezing

• melting

• cooling

• evaporating

• condensing

Which one of these words best describes the movement of gas molecules?

• randomly

• rusty

• rainy

• rapidly

Which of these best describes the atoms in a solid such as gold?

• they move all over the place quickly

• they move all over the place slowly

• they vibrate about a fixed position

• they do not move at all

Which of these describes the random bombardment of air molecules?

• Brown motion

• Brownian motion

• Bromine motion

• Bronian motion

Which of these best describes evaporation?

• the escape of more-energetic molecules from the surface of a liquid

• the escape of more-energetic molecules from the surface of a gas

• the escape of less-energetic molecules from the surface of a liquid

• the escape of less-energetic molecules from the surface of a gas

Which of these conditions is the best for drying clothes?

• hot, dry, still

• cold, dry, windy

• hot, wet, still

• cold, wet, windy

• hot, dry, windy

Which of these is the correct equation for specific heat capacity?

• E= mcT

• E= mc/T

• E= m/cT

• E= m/c/T

A mass of 5kg takes 2000J of energy to change its temperature from 40ºC to 50ºC. What is the specific heat capacity?

• 10 J/kgºC

• 20 J/kgºC

• 30 J/kgºC

• 40 J/kgºC

Which of these is the best absorber of infrared radiation?

• dark, matt surfaces

• dark, shiny surfaces

• light, matt surfaces

• light, shiny surfaces