knutsonellie741
07.12.2019 •
Physics
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. when he observes a height of 8.69 mm, what fraction of atmospheric pressure, expressed as a percentage, has jorge achieved in his bell jar? the density of mercury is 1.36 × 10 4 kg/m 3 and the standard atmospheric pressure is 1.01 × 10 5 pa. the acceleration g due to gravity is 9.81 m/s 2 . g
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Ответ:
1.147 %
Explanation:
= Density of mercury =
g = Acceleration due to gravity = 9.81 m/s²
h = Height of mercury = 8.69 m
Standard atmospheric pressure =
6.55 mmHg converting to Pa
Dividing air pressure by the above value
The fraction of atmospheric pressure is 1.147 %
Ответ: