Question

The vertical height of the mercury column above the free surface of mercury in the trough in a simple mercury barometer is

Answer 1

Answer:

Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column. Low pressure allows the mercury to drop to a lower level in the column by lowering the force placed on the reservoir.

Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column. Low pressure allows the mercury to drop to a lower level in the column by lowering the force placed on the reservoir.When the tube is pushed down into the trough of mercury the height of mercury column above the surface of the bottom surface remains the same.

Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column. Low pressure allows the mercury to drop to a lower level in the column by lowering the force placed on the reservoir.When the tube is pushed down into the trough of mercury the height of mercury column above the surface of the bottom surface remains the same. (b) When the tube is slightly tilted form vertical, there is no change in the height of the mercury in the tube.

Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column. Low pressure allows the mercury to drop to a lower level in the column by lowering the force placed on the reservoir.When the tube is pushed down into the trough of mercury the height of mercury column above the surface of the bottom surface remains the same. (b) When the tube is slightly tilted form vertical, there is no change in the height of the mercury in the tube.(c) If the vacuum is replaced with a drop, then the drop will exert some pressure on the mercury and there will be inaccurate readings on the barometer. The barometric height is decreased in this case. So, vacuum is present on top of the mercury inside the tube