Erectus 408 punti

Pressure

P = F/A
unit of measure is pascal.
The pressure P is the ratio of the force F acting perpendicularly to a surface area A.
Pressure applied to an eclosed fluid is transmitted undimnished to every part of the fluid and to the walls of the container. Pressure is a force acting on a liquid which must act on a container area.
Liquids are relatively incompressible.
Pascal's principle is applicable both to liquids and gases. The pressure on a gas is not transmitted as quickly as in a liquid.

Buoyancy + Archimede's principal
-Buoyancy: an upward force acting on an object in a liquid that balances part of the object's weight.
-Buoyancy force: the upward acting force.
-Archimede's principal: an object in a fluid is buoyed upward with a force equal to the weight of the volume of the fluid displaced by the object. This principal applies to gases as well as liquids. An object will float in a fluid if the density of the object is less than or equal to the density of the fluid.

Atmospheric pressure
-Standard atmospheric pressure at sea level supports a column of mercury 76cm or 760mm in height. Barometic pressure is reported in inches, centimitres or millimitres of mercury. (one torr = 1mm of Hg)
-Atmospheric pressure is measured by means of a barometer.

Motion

-Speed: rate of movement (scalar)
-Velocity: the speed of something in a particular direction (vector)
Motion involves a change of position in time.

Istantaneous velocity
Is the velocity at any given instant in time.

Hai bisogno di aiuto in Concetti generali di fisica?
Trova il tuo insegnante su Skuola.net | Ripetizioni
Registrati via email