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Can absolute pressure be negative

Updated: 8/11/2023
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15y ago

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Yes, but only in solids and liquids in special situations. Surface tension can allow liquids in very narrow channels to be placed in tension. This is believed to explain how some trees can pull sap hundreds of feet above the ground.

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15y ago
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14y ago
Yes by using Vacuum pump, but it will be up to about - 0.9 bar, or little more maximum and never reach to 1 bar, because the atmospheric pressure is 1 barPSIG can be negative, but PSIA can NEVER be negative. Look at the relationship between pressure and volume,

P1V1=P2V2

Since volume is NEVER negative, that would mean your initial absolute pressure would have to be negative, which here on Earth, or even in the void of space, is NEVER the case. So PSIA can NEVER be negative, and PSIG can be considered HIGH/HARD or LOW/SOFT vacuum(negative PSIG) in reference to a relative scale between 0 PSIA and 14.7 PSIA.

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6y ago

Yes it can - if the pressure is less than atmospheric pressure.

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14y ago

As vacuum pressure.

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Q: Can absolute pressure be negative
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Is it possible to have a negative absolute pressure?

No. "Absolute" means non-negative.


What is the maximum negative pressure can be reached in a system?

The maximum negative pressure in isolated system is negative ATM. ATM is the pressure created by air molecules and it is 1.01325*10^5 Pa. So a negative pressure of 1 ATM means absolute vacuum.


Is absolute pressure static pressure?

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Can bourdon's tube pressure gauge be used to measure negative pressure?

Bourdon's tube pressure gauge cannot be used to measure negative pressure. This is because absolute pressure must be measured and the Bourdon gauge only indicates the gauge pressure.


Can an absolute value equal a negative?

An absolute value can not be negative.


Are there negative absolute numbers?

NO, absolute value is always non-negative.


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If the absolute value of the negative is bigger than that of the positive, then the answer is negative. If the absolute value of the negative is the same, then zero. If the absolute value of the negative is smaller, then positive. Absolute value is the value ignoring the sign.


What is the opposite of the absolute value of negative 30?

The opposite is: negative (the absolute value of negative 30).


Is the absolute value of a positive integer a negative integer?

Absolute values are never negative. The opposite, or negative, or additive inverse, of a negative number is the number's absolute value; a non-negative number is its own absolute value. The absolute values of 7 and -5, are, respectively, 7 and 5.


When is the sum of a positive and negative integer negative?

When the absolute value of the positive integer is smaller than the absolute value of the negative one.


What happens when the negative sign is on the outside of the absolute value?

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