Jorge wishes to observe the progress of his vacuum pump in evacuating a tall bell jar for the purpose of demonstrating that sound waves do not travel in a vacuum. So, Jorge places a mercury barometer inside the bell jar and follows the height of the mercury column as the pump chugs away. The density of mercury is 1.36 104 kg/m and the standard atmospheric pressure is 1.01 105 Pa. The acceleration g due to gravity is 9.81 m/s. When he observes a height of 8.21 mm of mercury, what fraction of atmospheric pressure, expressed as a percentage P, has Jorge achieved in his bell jar? P = = % 20 One component of a metal sculpture consists of a solid cube with an edge of length 0.271 m. The alloy used to make the cube has a density of 6050 kg/m. Find the cube's mass m. m = kg