What are the key differences between Gauge pressure and absolute pressure?
Are there any other forms of pressure?
Answer
just wiki it. Anyways I will give you a oneliner from wiki itself-
Absolute pressure is zero-referenced against a perfect vacuum, so it is equal to gauge pressure plus atmospheric pressure.
Gauge pressure is zero-referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure. Negative signs are usually omitted.
Differential pressure is the difference in pressure between two points.
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