Sun 20 May, 2007 12:30 pm - How many minutes does it take light from the sun to reach Earth? (The distance from the sun to Earth is 93 million mi; the speed of light = 3.00 108 m/s.) (view)
Sun 20 May, 2007 12:30 pm - Osmium (Os) is the densest element known (density = 22.57 g/cm3). Calculate the mass in pounds and in kilograms of an Os sphere 40 cm in diameter (about the size of a grapefruit). [The volume of a... (view)
