Television signals are converted into light signals by ?

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The Sun is a __________?

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Which planet in our solar system has the most gravity?

A. Jupiter B. Mercury C. Venus D. Neptune...

Which of the following animals do not have jaws?

Mammals Protochordates Reptiles Birds...

Ozone layer protects the Earth from __________ radiations from the Sun.

A. microwaves B. infrared C. X-rays D. ultraviolet...

Diamond is harder than Graphite because of___________?

A. Difference in crystalline Structure B. Tetrahedral structure of diamond C. Difference in layer of atoms D. None of these...