7 The three main varieties are Chardonnay, Pinot Noir and Pinot Meunier. The four other varieties which are also acceptable within the official champagne designation are: Pinot Gris, Pinot Blanc, Petit Meslier and Arbane.
An aircraft flying at 40,000 feet can be heard to break the sound barrier when it achieves a speed of how many miles per hour?
