Physics
Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly

Reflect back the heat given by earth
Absorb heat from the atmosphere send it towards earth
Prevent cold waves from the sky descending on earth
Produce heat and radiate it toward earth

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Physics
Which of the following events occurred first ?

Madame Marie Curie became the first woman Nobel Prize winner
Marconi first tranmitted a wireless signal
Max Planck unveiled the Quantum Theory
Albert Einstein propounded the General Theory of Relativity

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