Energy Topic 1

Question 1

Name the 8 energy stores.

Answer 1

1. Thermal
   
   2. Kinetic
   3. Gravitational Potential
   4. Elastic Potential
   5. Chemical
   6. Magnetic
   7. Electrostatic
   8. Nuclear

Question 2

Name the 4 energy transfer pathways.

Answer 2

1. Mechanically (by a force doing work)
   
   2. Electrically (by a current)
   3. By heating
   4. By radiation (light or sound)

Question 3

What is the principle of conservation of energy?

Answer 3

Energy cannot be created or destroyed; it can only be transferred between stores or dissipated.

Question 4

What is the equation for kinetic energy?

Answer 4

KE = 0.5mv2
Where:
• KE = kinetic energy (J)
• m = mass (kg)
• v = velocity (m/s)

Question 5

What is the equation for gravitational potential energy?

Answer 5

GPE = mgh
Where:
• GPE = gravitational potential energy (J)
• m = mass (kg)
• g = gravitational field strength (9.8 N/kg on Earth)
• h = height (m)

Question 6

What are the equations for power?

Answer 6

P = E/T
• P = power (W)
• E = energy transferred (J)
• W = work done (J)
• t = time (s)

Question 7

What is the equation for work done?

Answer 7

W = F d

W = work done (J)
F = force (N)
d = distance moved in the direction of the force (m)

Question 8

What is the equation for efficiency?

Answer 8

Efficiency= useful energy output/ total energy input x 100

Question 9

What is the equation for specific heat capacity?

Question 10

Name 4 renewable and 3 non-renewable energy sources.

Answer 10

Renewable:
• Solar
• Wind
• Hydroelectric
• Geothermal

Non-Renewable:
• Coal
• Oil
• Natural Gas