Energy

Question 1

Forms of energy transfer by heating:

Answer 1

conduction
convection
radiation

Question 2

Energy transfer in conduction

Answer 2

vibrations are passed on between particles in a solid

Question 3

Energy transfer in convection

Answer 3

part of a fluid that is warmer than the rest rises and sets up a convection current

Question 4

Energy transfer by Radiation

Answer 4

the only way in which energy can be transferred through a vacuum

Question 5

What do we call energy stored in a moving object

Answer 5

Kinetic energy

Question 6

What do we call energy stored in an object due to its position in earth’s gravitational field

Answer 6

gravitational potential energy

Question 7

Unit for energy

Answer 7

Joules ( J )

Question 8

Equation for change in gravitational potential energy

Answer 8

Change in GPE(J)= mass(kg) x gravitational field strength (N/kg) x change in height(m)

Question 9

Equation for kinetic energy

Answer 9

KE (J) = 1/2 x mass(kg) x speed(m/s)2