A stone is dropped off a tall building. It takes 4.5 s to hit the ground Determine the height of the building.

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When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

Blank is the perceived frequency of a sound wave