Physics
The tidal waves on sea is mainly due to

None of these
Gravitational Effect of Moon on Earth
Gravitational Effect of Sun on Earth
Gravitational Effect of Earth on Moon

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Physics
To resolve an object in an electron microscope,

The wavelength of the electrons must be greater than the diameter of the object.
The wavelength of the electrons must be close to the diameter of the object
None of these
Both A & B

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