Grade 4 · Science
Describe energy transfers in everyday devices
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An electric bell is used to announce the end of a lesson. Which useful output signals the class?
- light
- motion
- heating
- sound
See the answer & why
sound
The audible bell sound communicates the signal.
A little hint: Name the device’s energy input, such as electrical energy.
Name the device’s energy input, such as electrical energy.
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