Physics
Which of the following is an example of simple harmonic motion?

Ball bouncing on floor
Motion of a ceiling fan
Simple pendulum motion
Earth spinning on its axis

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Physics
In the gamma decay of a nucleus

The mass number of the nucleus does not change whereas its atomic number changes
The mass number of the nucleus changes whereas its atomic number does not change
Both the mass number and the atomic number of the nucleus change
Neither the mass number nor the atomic number of the nucleus changes

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