Physics Energy Sept 2017

Question 0

What are the 8 energy stores?

Answer 0

Kinetic, GPE, EPE, Thermal, Chemical, Electrostatic, Magnetic and Nuclear

Question 1

What are the 4 energy pathways?

Answer 1

Mechanical, radiation, electrical and heating

Question 2

What is the equation for Kinetic energy?

Answer 2

KE = 1/2 m v2

Question 3

What is the equation for GPE?

Answer 3

GPE = m g h

Question 4

What is the equation for EPE?

Answer 4

EPE = 1/2 K e*2

Question 5

What is the equation for Work Done?

Answer 5

WD = F x S (Work Done = force distance in the direction of the force)

Question 6

What is the definition for Work Done?

Answer 6

Work Done is when energy is transferred

Question 7

What is the equation for Power?

Answer 7

P = E/T (Power = energy divided by time)

Question 8

What is the definition of power?

Answer 8

Power is the rate of transfer of energy

Question 9

What are the two equations for efficiency?

Answer 9

Efficiency (%) = useful output energy/ total input energy (x100)

Efficiency (%) = useful output power/ total input power (x100)

Question 10

What is the equation for SHC?

Answer 10

E = m c [delta] [theta] (Thermal energy = mass x specific heat capacity x temperature change

Question 12

What is the definition of SHC?

Answer 12

The specific heat capacity of s material is the amount of energy need to to raise 1Kg of the material by 1 degree Celsius

Question 13

What are non renewable energy sources?

Answer 13

Energy sources that will run out because they are finite resources which take thousands of years to replenish.

Question 14

What are renewable energy sources?

Answer 14

Energy sources that will never run out. They are (or can be) replenished when they are used.