Explain optical telescopes?
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Which waves are used in sonography?
Explain the Opaque ?
Define weight?
Explain heat treatment. Why and how is it done?
Swimmers are provided with an inflated rubber jacket . why?
Explain when is fluorescence strong?
Explain the Hygrometers ?
Differentiate static and kinetic friction.
laser is an acronym for light amplification by
What is anti - noise?
Which is heavier the land mass or the sea?
Describe the Periscope?