Why Does a Trumpet Have Valves?
Valves in a trumpet enable the player to lower, momentarily, the pitch of the note he wishes to make. What happens when one of…
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Valve
How Does a Giraffe Stoop to Drink?
How Does a Giraffe Stoop to Drink? Because of its long legs and neck, drinking is a difficult chore for the giraffe. The neck of a giraffe h