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What is the space above the mercury in the tube of a mercury barometer?
The space above the mercury in the tube of a mercury barometer is a vacuum, meaning it is devoid of air or any other gases. This vacuum allows for accurate measurement of atmospheric pressure, as the height of the mercury column is influenced solely by external air pressure acting on the surface of the mercury in the reservoir. Changes in atmospheric pressure will cause the mercury to rise or fall in the tube, providing a reliable indication of current pressure levels.
What doesnot cause the height of mercury column to vary?
A change in the material of the container holding the mercury does not cause the height of the mercury column to vary. The height of the mercury column is determined by the atmospheric pressure acting on the surface of the mercury in the container.
Does height of water column depend upon pressure?
Yes, the height of a water column in a container does depend on the pressure acting on it. The greater the pressure, the higher the water column will be due to greater force pushing the water upwards. This is based on the principle of hydrostatic pressure in fluid mechanics.
What equals the force of Earth's atmosphere on the mercury in the dish?
The force of Earth's atmosphere on the mercury in the dish is equal to the atmospheric pressure acting on the surface area of the mercury. This can be calculated using the formula ( F = P \times A ), where ( F ) is the force, ( P ) is the atmospheric pressure (approximately 101,325 Pa at sea level), and ( A ) is the surface area of the mercury in the dish. The pressure exerted by the atmosphere pushes down on the mercury, causing it to rise in a connected column, such as in a barometer.
How does the water pressure change with the height of the fixture?
The water pressure increases as the height of the fixture increases. This is because the higher the fixture, the greater the gravitational force acting on the water, resulting in higher pressure.
Why is it hard to breath when deep sea diving?
Because - unless you're in a rigid suit, the deeper you go, the greater the pressure of the water acting on your body. Think of it like someone sitting on your chest while you're trying to breathe !
Why is the pressure at the bottom of an object in fluid greater than the pressure at the top of the object?
because of the height, as you go down further in depth the greater the pressure. imagine when you at a greater depth the greater amount of fluid you have to endure. the pressure would be the same everywhere at the same depth in fluid but the force on the object would depend on the area of the object.
Why iron ball floats on mercury?
An iron ball floats on mercury because mercury is much denser than iron. The buoyant force acting on the iron ball due to the displacement of mercury is greater than the gravitational force pulling it downward, causing it to float.
When the pressure at the bottom of a submerged object is greater than the pressure at the top of the submerged object a buoyant force is producE?
Yes, when the pressure at the bottom of a submerged object is greater than the pressure at the top, there is a net upward force acting on the object due to the difference in pressure. This upward force is the buoyant force, which acts in the opposite direction of gravity, causing objects to float or rise in a fluid.
How can you complete this sentence so it is always true the greater the net force acting on an object?
The greater the net force acting on an object, the greater the acceleration of the object will be.
What is an example of torricelli's principle?
An example of Torricelli's principle is when you use a barometer to measure atmospheric pressure. The height of the mercury column in the tube of a barometer is determined by the atmospheric pressure pushing down on the mercury in the dish. This is in accordance with Torricelli's principle, which states that the height of a liquid in a tube is inversely proportional to the pressure acting on it.
Why does helium balloons pop in the hot sun and what pressure is acting on it?
Helium expands in the heat, causing the gas inside the balloon to increase in pressure. As the pressure inside the balloon becomes greater than the strength of the balloon's material, it can pop. The pressure acting on the balloon is the sum of the internal pressure of the expanding helium gas and the external atmospheric pressure.
