Who invented the bifocal glasses?
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Who won Nobel prize for Physics in 2015?
Which of the following was the winner of the Grammy Awards 2016 "Country Song of the Year"?
What is the reason for formation of Mirage in desert?
The force of friction between two surfaces will increase if:
The given symbol stands for a/an ___ in an electric circuit.
Which of the following physical quantity measures the rate of work done?
The absolute refractive index of air is