Physics
Which of the following is correct about the properties of Gravitational Forces?

They observe inverse square law
They are the strongest forces in nature
None
Both a and b

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Physics
Why are we able to hear short wave broadcasts better than long wave broadcasts ?

Short waves are more energetic than long waves.
By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.
Short waves are unaffected by atmospheric disturbances.
Short wave broadcasts are made by nearby radio stations.

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