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

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

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Physics
Circuit breaker usually operate under

Steady state of short-circuit current
After D. C. component has ceased
Transient state of short-circuit current
Sub-transient state of short-circuit current

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Physics
Why does the sea appear blue in colour?

Scattering of the sunlight by water molecules
Interference of the sun light from water surface
Refraction of the sun light
Reflection of the sun light from water surface

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