World Geography
The right ascension is the equivalent of longitude on the celestial sphere, and it is given in the units of

only seconds
degrees
only hours
time-hours, minutes and seconds

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World Geography
The periodic rise and fall of the sea level on the earth, gives rise to tides. This is related to

ultraviolet rays from the sun
None of these
the position of the moon with reference to the earth and the gravitational pull exerted mainly by the moon and partly by the sun
infrared rays from the sun

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