Topic 1

Question 1

What are the energy stores

Answer 1

Thermal 
Kinetic
Gpe
Elastic potential 
Chemical
Magnetic
Electrostatic
Nuclear

Question 2

What’s a closed system

Answer 2

Where neither matter or energy can enter or leave

Net change is always zero

Question 3

What’s work done

Answer 3

Energy transferred

Question 4

What’s the equation for kinetic energy

Answer 4

E = 1/2mv2

Kinetic energy = half mass X velocity squared

Question 5

What’s the equation for gravitational potential energy

Answer 5

E= mgh

Gpe = mass X gfs X height

Question 6

What’s the equation for elastic potential energy?

Answer 6

E= 1/2ke2

Elastic potential energy = half spring constant X extension squared

Question 7

What’s the prac for specific heat capacity?

Answer 7

Measure mass of block wrap in insulator. Insert thermometer and heater. Measure initial temp and set power to 10V
Current does work on heater transferring energy from power supply to thermal energy store. Material increases temp
Measure temp and current every min for 10 mins. Current doesn’t change.
E=pt