to indicate MPa also often used the number 10 to the sixth power.Pascal is the pressure which creates a force in newton uniformly distributed along the normal to it surface area of ​​1 square meter.Unit of pressure is named after the French mathematician and physicist Blaise Pascal.Formally pressure unit (1 Pa = 1 H / m) coincides with the unit of energy density (J / m), i.e. the amount of energy per unit volume (or unit weight).However, they describe different physical properties and therefore, in terms of science and equivalent.In this regard, the pressure correctly recorded as J / m³ and Pascal unit used to measure the energy density.
So Pascal - the pressure of one newton per square meter.Newton - unit strength is defined as the force that changes the 1 meter per second, the speed of the body mass of 1 kilogram per unit of time equal to one second.The formula is as follows: - 1 H = 1 kg * m / s².This provision stems from the second law of Isaac Newton, the famous English physicist, astronomer and mathematician.
practice translate Pascali Newton is best using the formula weight - P = mg.Where m - is the mass and g - is the acceleration due to gravity, which is equal to 9,8m / s².Weighing in physics called the force acting on the bearing, which prevents a fall.It is measured in Newtons.Measure the force with which one kilogram of pressure on the Earth's surface - P = mg = 1kg * 9,8m / s² = 9,8kg * m / s² = 9.8 N. That is, on the body weight of 102 grams (1000g / 9,8H = 102,04g) on ​​the surface of the Earth the force of gravity (force of gravity) which is equal to 1H.For the convenience of calculation round off weight to 100 grams.So, 1H is approximately equal to the force of gravity on the surface of one hundred grams of one square meter - 1 H = 100 g / 1m².As set forth above, Pa - the value indicates the pressure of one newton on 1m² - 1 Pa = 1N / 1m².Thus, substituting the first expression of a second, you get a value approximately equal to 100 Pa c.Then multiply both sides of the expression in a million for the construction of Pa MPa .In the end, it turns out that one million Pascals (MPa 1 ) - is one hundred thousand kilograms, or 100 tonnes,it comes with such force pressure 1 MPa on 1m² surface.