Energy

Question 1

What is Specific Heat Capacity?

Answer 1

The Specific Heat Capacity of a substance is the amount of energy required to raise the temperature of 1Kg of a substance by 1 degree

Question 2

State the Law of Conservation of Energy

Answer 2

Energy can be transferred usefully, stored or dissipated but it cannot be created or destroyed

Question 3

What problem does a swinging pendulum have that may cause it to slow down?

Answer 3

Friction may occur at the fixed point and as the pendulum passes through air particles, causing energy to be transferred to thermal energy, causing the pendulum to slow down

Question 4

Why will a bungee jumper never return to their original position after jumping?

Answer 4

Some enery is always dissipated as thermal energy due to friction with air particles. Also the bungee rope is not fully elastic, so the stretching effects will be different

Question 5

What is work?

Answer 5

Work is done whenever energy is transferred from one store to another

Question 6

Name the two types of work

Answer 6

• Mechanical work - using a force to move an object
• Electrical work - involves a current transferring energy