The ceiling of a classroom is 3.30 m above the floor. A student tosses an apple vertically upward, releasing it 0.40 m above the floor.

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The ceiling of a classroom is 3.30 m above the floor. A student tosses an apple vertically upward, releasing it 0.40 m above the floor. What is the maximum initial speed that can be given to the apple if it is not to touch the ceiling?

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