Suchita is going to make an energy transfer diagram to represent the energy transformations associated with the flame of a gas stove. The diagram will show that the chemical energy of the fuel transforms into 50 J of chemical energy, 400 J of heat, and 200 J of light. Which statement describes Suchita’s final diagram?
Answer
A
The arrow for heat is the widest output arrow.
B
The arrow for chemical energy is the shortest output arrow.
C
The initial chemical energy is 50 J.
D
There is one arrow for input and one for output.
Explanation
Both statements describe the diagram correctly if arrow width represents the amount of energy. Heat is 400 J, the largest output, so its arrow is the widest; chemical energy is 50 J, the smallest output, so its arrow is the shortest. The question has two correct choices rather than one.
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