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Vacuum refers to a volume of space that is essentially empty of matter,such that is gaseous pressure is much less than atmospheric pressure. while AIR is the mixture of oxygen, nitrogen,and other gases that are consistently present around us.
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CoachVacuum is empty which has no any molecules to transmit sound wave but not for air, which has molecules to transmit sound waves, this is called medium (air).
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What is the difference between a vacuum cleaner and a vacuum?
A vacuum cleaner is a machine used to clean floors by sucking up dirt and debris, while a vacuum refers to a space devoid of matter or air.
What role does pressure play in the functioning of a vacuum?
Pressure plays a crucial role in the functioning of a vacuum by creating a difference in pressure between the inside and outside of the vacuum. This pressure difference allows the vacuum to suck in air or other substances, creating a low-pressure environment inside the vacuum.
How does light change speed from glass to air?
Light changes speed when it moves from glass to air due to the difference in optical density between the two mediums. In glass, light travels slower due to the higher density, resulting in refraction as it enters the less dense air. This change in speed causes the light to bend and change direction.
What is difference between density in air and density in vacuum?
Density refers to the amount of mass per unit volume. In air, there are molecules present which contribute to the overall mass and density. In a vacuum, there are no molecules present, so the density is essentially zero.
What causes the suction of a vacuum?
The suction of a vacuum is caused by a difference in air pressure inside the vacuum cleaner compared to outside. A motor creates a low-pressure zone inside the vacuum, causing the higher-pressure air outside to push debris into the vacuum cleaner.
