explain Pascal pressure
Answers
Answer:
⭐You have a pressure of 1 Pascal when a force of 1 Newton is applied on 1 square meter.
⭐A Newton, that’s more or less the weight of an apple on the surface of the Earth.
⭐To give you an idea, the atmosphere constantly applies about one hundred thousand Pascals of pressure on you.
⭐Yep. That’s like one hundred thousand apples per square meter. Or about the weight on Earth of a mass of 10 tons.
⭐This is why you can’t manually open doors in your average airliner when at cruising altitude.
⭐The pressure outside is very low (about 20% of what it is at sea level) and the cabin is pressurized at about 80% of the pressure at sea level. So you get a pressure difference above half of the atmospheric pressure at sea level.
⏩Now on a B737 the doors are usually 1.83∗0.86m2 which is roughly 1.5m2.
⭐This means the airplane’s pressure is pushing the door against the frame with the equivalent force of something that has a mass of 7.5 tons at the surface of the Earth.
⏩Anyway, the Pascal is rather a small unit.
⭐According to Wikipedia, the pressure exerted by a one dollar bill lying flat on a surface (at the surface of the Earth) is around 1Pascal.
⭐A light breeze is already 10 Pascals.
Answer:
The pascal ( abbreviated Pa) is the unit of pressure or stress in the International System of Units (SI). It is named after the scientist Blaise Pascal. One pascal is equivalent to one newton (1 N) of force applied over an area of one meter squared (1 m2). That is, 1 Pa = 1 N · m-2. Reduced to base units in SI, one pascal is one kilogram per meter per second squared; that is, 1 Pa = 1 kg · m-1 · s-2.
If a pressure p in pascals exists on an object or region whose surface area is A meters squared, then the force F, in newtons, required to produce p is given by the following formula:
F = pA