Question 1
The energy flow diagram shows the energy transformations in a domestic electric kettle used to boil water. Which statement best describes the efficiency of this kettle?
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Physics · Unit 1 · Heating processes · Kinetic particle model and specific heat capacity
Describe the concept of efficiency.
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Question 2
A solar heating system absorbs 12,500 J of radiant energy from the Sun. Of this energy, 9,000 J is transferred to water in the storage tank, while the remaining energy is lost to the surroundings through conduction and radiation. What conclusion can be drawn about the efficiency of this heating system?
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Question 3
What does the term 'efficiency' describe in a heating system?
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