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/m³ and the standard atmospheric pressure is 1.01 × 105 Pa. The acceleration g due to gravity is 9.81 m/s². When he observes a height of 7.89 mm of mercury, what fraction of atmospheric pressure, expressed as a percentage P, has Jorge achieved in his bell jar? P = %

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/m³ and the standard atmospheric pressure is 1.01 × 105 Pa. The acceleration g due to gravity is 9.81 m/s². When he observes a height of 7.89 mm of mercury, what fraction of atmospheric pressure, expressed as a percentage P, has Jorge achieved in his bell jar? P = %

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter15: Fluid Mechanics

Section: Chapter Questions

Problem 62P: In about 1657, Otto von Guericke, inventor of the air pump, evacuated a sphere made of two brass...

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