A person holding a pen in his left hand sees his reflection in the mirror holding the pen in his right hand. This is due to which of the following phenomena?
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Meter in a vehicle that calculates distance covered by the vehicle is called __________.
The apparent weight of a person in a lift which is moving down with uniform acceleration is _______.
_________________ is a measure of the moisture in air.
When a ray of light travels from a denser medium to a rarer medium, it bends
The instrument used for measuring air pressure is called .....
What is the fundamental unit of amount of a substance?
The pitch of a sound depends on its ____.
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