Gauge pressure is zero-referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure. Absolute pressure is measured with reference to an absolute (and theoretical) vacuum. For example, an ordinary pressure gauge reading of zero does not mean there is no pressure; it simply means there is no pressure in excess of atmospheric pressure. Gauge Pressure = Total Pressure â 1 atm. The conversion factor that needs to be used in order to convert between gauge pressure and absolute pressure is atmospheric pressure. By adding a pressure of 1 atmosphere to an absolute pressure, the corresponding gauge pressure can be determined. Gauge pressure is measured with the standard atmospheric pressure as the baseline. Therefore, positive gauge pressures indicate that the pressure is above atmospheric pressure. Conversely, negative pressures indicate that the pressure is below atmospheric pressure.
The worse the blisters are, the longer the burn will take to heal. In some severe cases, skin grafting is required to fix the damage. Skin grafting takes healthy skin from another area of the body and moves it to the site of the burned skin. As with first-degree burns, avoid cotton balls and questionable home remedies.
Atopic dermatitis is a disease that causes skin rash. According to the National Institute of Arthritis and Musculoskeletal and Skin Diseases, atopic dermatitis, also known as eczema, is a chronic or long-lasting disease that affects a person's skin.hoto Credit family image by Mat Hayward from Fotolia.com. There are many diseases that cause skin rash. According to MedlinePlus, rashes affect the color or texture in a person's skin. The cause of a rash can often be determined based on the observable characteristics of the rash and other accompanying symptoms.