Physics 1

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  • Created by: kelz0209
  • Created on: 07-04-14 18:55
What is draught-proofing?
Strips of foam and plastic aroubd doors and windows- stops draughts of cold air blowing in (reduce heat loss due to convection).
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How does a hot water tank jacket reduce heat loss by conduction and radiation?
It has lagging such as fibre glass wool, which reduces conduction and radiation.
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Why is no device 100% efficient?
Because heat is also given off as wasted energy.
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How to heat exchangers reduce the amount of heat energy that is lost?
Pump cool fluid through escaping heat.Temperature of fluid rises as it gains heat energy.Heat energy in fluid can be converted into useful energy-original device or other useful functions.e.g.heat from car enguine-air to warm passenger side.
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What are kilowatt-hours (kWh) units for?
Energy.
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What is energy measured in?
Joules (J)
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What is the equation for energy?
Energy= power x time
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Other cards in this set

Card 2

Front

How does a hot water tank jacket reduce heat loss by conduction and radiation?

Back

It has lagging such as fibre glass wool, which reduces conduction and radiation.

Card 3

Front

Why is no device 100% efficient?

Back

Preview of the front of card 3

Card 4

Front

How to heat exchangers reduce the amount of heat energy that is lost?

Back

Preview of the front of card 4

Card 5

Front

What are kilowatt-hours (kWh) units for?

Back

Preview of the front of card 5
View more cards

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