Scientific Principles Possible Exam Questions

What expands the most when heated? (coefficient of linear expansion)?

• Steel

• PVCu

• Copper

• Iron

What produces AC electricity?

• Photovoltaic cells

• Alternator

• Batteries

• Solar panels

Definition of specific heat capacity

• Energy required to increase 1kg of a substance by 1°C

• Heat stored in a material

• Energy released during combustion

• Heat capacity of an object

How much does 10mm copper expand by when increasing in temperature from 5 to 25 degrees celcius. If the coefficient of linear expansion for copper is 0.000018

• 0.0036m

• 0.10m

• 0.0015m

• 1m

What gas has a density of 0.6?

• Natural Gas
• Oxygen

• Butane

• Propane

Calorific value of butane

• 121.5MJ/kg

• 95MJ/kg

• 108MJ/kg

• 140MJ/kg

Material of a Victorian bath

• Cast Iron

• Steel

• Porcelain

• Fibreglass

Material used in pipework in schools

• Copper

• Stainless Steel

• Low Carbon Steel

• Plastic

Why is a white radiator better than a dull radiator?

• Absorbs heat better

• Reflects heat better

• Is cheaper to make

• Conducts heat faster

What reflects sunlight more?

• Dark surface

• Metallic surface

• Light surface