Conservation Of Energy

Question 1

What are the 8 main energy stores?

Answer 1

• Chemical
• Kinetic
• Gravitational potential
• Elastic
• Thermal
• Magnetic
• Electrostatic
• Nuclear

Question 2

What is the equation for efficiency?

Answer 2

Efficiency = Useful energy transferred by machine / Total energy supplied to machine x 100

Question 3

What is the equation for gravitational potential energy?

Answer 3

Change in GPE = Mass x GFS x Change in vertical height

Question 4

What is the equation for kinetic energy?

Answer 4

KE = 1/2 x Mass x Speed^2

Question 5

What are the main renewable energy sources?

Answer 5

• Solar cells
• Biofuels
• Hydroelectricity
• Wind turbines
• Tidal power
• Geothermal
• Waves

Question 6

What are the main nonrenewable energy sources?

Answer 6

• Nuclear fuels (eg uranium)
• Fossil fuels (coal, oil, natural gas)