# What Creates a Stronger Vacuum: 15inHG or 10inHG?

• Ruffian
In summary, a higher reading of a number in inHG units typically indicates a stronger vacuum, as it is measured below atmospheric pressure. However, in some cases, inHG can be used as a direct measure of pressure, in which case a lower reading would indicate a stronger vacuum. In general, vacuums are often measured using the unit mTorr, with higher vacuum levels being in the range of 10^-5 to 10^-7 Torr.
Ruffian
Im just wondering, is a higher or lower reading of a number in inHG units indicating a stronger or weaker vacuum?

For Example:
What is creating a stronger vacuum?
15inHG or 10inHG

Thanx,

Often vacuums are measured in inHG (aka: inches of mercury) below atomospheric pressure (as a gauge pressure). Thus 15 inHG would be a stronger vacuum than 10 inHG.

But inHG can also used as a direct measure of pressure (conventional or absolute pressure), in which case: the lower the pressure, the stronger the vacuum.

We often use the unit mTorr to indicate vacumm. 1 Torr equals 1mmHg. So the vacuum reaches 76mTorr means the pressure is 10e-4 times smaller than the ambient pressure. Higher vacuum (lower pressure) can be measured in 10^-5 - 10^-7 Torr.

## 1. What is a vacuum?

A vacuum is a space that is completely devoid of matter, including air molecules. It is created when the pressure of a closed system is reduced below atmospheric pressure.

## 2. How is vacuum strength measured?

Vacuum strength is typically measured in units of pressure, such as inches of mercury (inHg) or pascals (Pa). These units represent the amount of force exerted by the vacuum on a surface per unit area.

## 3. Which creates a stronger vacuum: 15inHg or 10inHg?

A vacuum with a pressure of 15inHg is stronger than one with a pressure of 10inHg. This is because a lower pressure indicates that there are fewer air molecules in the space, creating a stronger "pull" on the surface.

## 4. How does a vacuum cleaner create a vacuum?

A vacuum cleaner uses a motor to create suction, which pulls air and debris into the machine. The air is then forced through a filter, trapping the debris and allowing the clean air to be released back into the room. This process creates a vacuum inside the machine.

## 5. Can a vacuum be too strong?

Yes, a vacuum can be too strong in certain situations. For example, a vacuum that is too strong could damage delicate materials or cause implosions in sealed containers. It is important to use the appropriate level of vacuum for the task at hand.

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