Physics
Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen?

Any of them may reach greater height
The lighter mass will reach greater height
The heavier mass will reach greater height
Both will reach the same height

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Physics
A hydrogen balloon floats up because of

Air pressure decreases with decrease in weight
Weight of the balloon is less than the weight of air displaced by it.
Air pressure decreases with decrease in height
The pressure inside the balloon is more than the pressure outside it

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