state the formula for calculating pressure
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Physics Formulas
Pressure Formula
The pressure is something that we apply to many objects in our daily life. For example, for opening tight jars and seal pack object we apply pressure on them to open them. In this topic, we are going to discuss pressure, pressure formula and solved examples.
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Questions
1 millibar is equivalent to :
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By observing the diagram, answer the following.
a) How does the pressure at A differ from the pressure at B.?
b) The pressure at B is greater than the pressure at D. Is it true?. Justify your answer.
c) Compare the pressure at A and C.
d) If the water is replaced with mercury, how would this affect the pressure at A and D?
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I torr is equal to the pressure exerted by :
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Pressure
pressure formula
Pressure on walls of the container
We can define pressure as the physical force that we exert on an object. Also, the force applied to the object is perpendicular to the surface of the object per unit area. Moreover, the unit of pressure in Pascals (Pa).
Besides, there are different types of pressures such as atmospheric, absolute, gauge, and differential pressure. Moreover, when you sip out the beverage from a straw, you firstly suck out the air from the straw? Also, when you sip the beverage you actually apply ‘pressure’.
Meaning of Pressure
For understanding pressure in a more clear sense let’s discuss a situation. Suppose you take a bowling pin and try to hammer it into a wall. In doing so you find out that nothing will happen to the bowling pin but it can damage your wall.
But, if in place of the bowling pin you use a nail and try to hammer it with same force then the nail would likely to penetrate the wall. By this example, we came to know that just knowing the magnitude of the force is not enough you also need to know how that force will distribute on the surface of impact.
Moreover, for the nail the all the force amidst the wall and the nail was centered into the small area on the sharp tip of the nail. On the other hand, for the bowling pin, the area touching the wall was much larger in comparison to the nail and as a result, the force was less concentrated.
Pressure Formula
Simply the pressure formula is
P = F / A
Derivation
P = Pressure in Pascal
F = Force on the object
A = Area on which the force act
Besides, we often calculate pressure for gases and fluids. In those conditions, the pressure of liquid or gas is equal to the density of that fluid multiplied by the acceleration due to the gravity and the height (depth) of the fluid above a certain point.
Pressure = density of fluid × acceleration due to gravity × height of the fluid column
P = ρ ×g × h
Explanation:
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Answer:
P=F\A
p means pressure
F means force
A means area