Topic 1a - energy transfers (6. reducing unwanted energy tranfers)

Question 1

what are thermal insulators

Answer 1

when people build a house they want to keep the heat inside the house and not let it escape. they do this by using thermal insulators. You can reduce the amount of energy lost from a building using thermal insulators.

Question 2

give 5 example of thermal insulators

Answer 2

cavity walls, loft insulation, double glazing, hot water tank jacket, thick curtains

Question 3

what is lubrication used for

Answer 3

whenever something moves there’s usually at least one frictional force acting against it. this causes some energy in the system to be dissipated. lubricants can be used to reduce the friction between the surfaces of the objects.