An electric flashlight can be charged by turning a crank. Identify the types and order of energy changes happening.
a
Electric --> Light --> Heat
b
Electric --> Heat --> Mechanical
c
Mechanical --> Heat --> Electric
d
Mechanical --> Electric --> Light
d
Mechanical --> Electric --> Light.
The correct answer is:
c) Mechanical --> Heat --> Electric
In an electric flashlight that can be charged by turning a crank, the energy changes happen in the following order:
1. Mechanical energy: When the crank is turned, mechanical energy is applied to the flashlight.
2. Heat energy: Some of the mechanical energy is converted into heat energy due to friction within the flashlight's mechanism.
3. Electric energy: The heat energy is then converted into electric energy. This conversion is typically done by a dynamo or generator within the flashlight.
So, in summary, the energy changes in an electric flashlight that can be charged by turning a crank occur in the sequence of Mechanical --> Heat --> Electric.