General Science - PHYSICS Notes-1

General Science - PHYSICS Notes-1

General Science - PHYSICS The SI unit of pressure is Pascal Pascal (Pa): The SI unit of pressure, named after Blaise Pascal, a French scientist. Pressure Definition: Force applied per unit area. This is exactly right, and the formula (pressure = force/area) reflects this concept. 1 Pascal: This is equivalent to 1 Newton of force acting on an area of 1 square meter. The equation you provided (1 Pa = 1 N/m²) shows this relationship. There's a minor point to consider in the last equation. It's almost there! While 1 Pa is indeed 1 N/m²,  it's not quite the same as 1 kg/m.  The reason is because a Newton (N) is a unit of force, and it takes into account mass and acceleration.  The full conversion is: 1 N = 1 kg * m/s² Therefore, 1 Pa (1 N/m²)  would be equivalent to: 1 Pa = (1 kg * m/s²) / m²  = 1 kg/m⋅s² The "s²" (seconds squared) term comes from the unit of acceleration within a Newton. SI unit of energy is the joule Actually, the kilowatt-hour (kWh) is not the SI unit of energ…