AQA Physics GCSE Topic 1

When you lift up a heavy object, what is work predominantly being done against?

• Gravity

• Air resistance

• Muscles

Why do we lubricate moving parts?

• Because the sound from un-lubricated parts is annoying

• To avoid energy being wasted due to friction, heating up surroundings

• Because it's fun

• To prevent energy being wasted as sound

Why do we insulate buildings?

• To slow down the rate of heat loss to surroundings

• Because it looks nice

• Because it's what all the cool kids do

Is Nuclear energy, as a source of electricity, renewable or non-renewable?

• Non-renewable

• Renewable

Why is using coal to produce electricity bad for the environment?

• It's widely available

• It's extraction often harms local environments

• It produces CO₂ when burnt

• It can cause acid rain when burnt

What is a disadvantage of using geothermal energy?

• Only available in select places

• Doesn't produce very much energy

• Extremely complex to set up

• Will one day run out

What can the burning of oil produce?

• CO₂

• CO

• SO₂

• NO₂

What is the specific heat capacity of a material?

• The energy required to heat 1kg of an object by 1°C

• The energy required to heat a set mass of the material by a set temperature

• 100

• 4200

An material has a specific heat capacity of 20 J/KG/°C. Calculate the energy required to heat 78 KG of it by 0.004°C

• 6.24J

• 3.12J

• 12.48J

• 1.62J

An material has a specific heat capacity of 4503.85 J/KG/°C. Calculate the energy required to heat 48822 KG of it by 0.0000304°C, to 1 D.P.

• 6684.6J

• 66845.6J

• 668.5J

• 66846J