Physics
The laws which govern the motion of planets are called ________

De Morgan's Laws
Avogadro's laws
Kepler's Laws
Newton's Laws

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Physics
Which one of the following is not a property of electromagnetic waves?

Electromagnetic waves are transverse waves
Oscillating electric field and magnetic field are perpendicular to each other.
Electromagnetic waves do not require a medium to propagate.
Electromagnetic waves do not show interference and diffraction.

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