Physics
A bomb explodes on the moon. You will hear its sound on earth after ________

2 hours 20 minutes
3.7 hours
You cannot hear the sound of explosion
20 minutes

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Physics
Which of the following events occurred first ?

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

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