a scale ranking ten minerals from softest to hardest; used in testing the hardness of minerals. Define DENSITY: A measure of how much matter there is in a given amount of space.
Jerusalem is a hilly city so the altitude varies but it is approximately 750 Meters (2,500 feet) above sea level.
After the terrorist acts of September 11, 2001, Trump reduced the planned height to 78 stories and 1,073 feet (327 m), to reduce the risk of similar attacks. Time magazine reported that a meeting between Smith and Trump about erecting the tallest building in Chicago was taking place at the actual time of the attacks.