Physics
A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the same speed. Find the ratio of the speeds of the two stones when they hit the ground.

0.043055555555556
0.044444444444444
0.042361111111111
Cannot be found from the given information.

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Physics
A dynamo is used to convert

Magnetic energy into mechanical energy
Electrical energy into magnetic energy
Mechanical energy into electrical energy
Electrical energy into mechanical energy

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Physics
Which of the following occurred first ?

Wright Brothers successfully flew an aircraft
Max Planck unveiled the Quantum Theory
Guglielmo Marconi sent out the first wireless signals
Albert Einstein propounded the General Theory of Relativity

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