Physic-Pressure Flashcards
To know the two pressures, Gas and Liquid
Define
Pressure
Pressure is the force per unit area applied in a direction perpendicular to the surface of an object.
Formula
Pressure
Pressure=Force/Area
Units
Pressure
Newtons per square meter(N/m²)/Pascals(Pa)
Define
Gas pressure
Pressure exterted by a gas colliding with the walls of it’s container.Unlike with liquids , gases expand to fill their container, exterting equal pressure on all sides
Define
Liquid pressure
Pressure exterted by a liquid colliding with the walls of it’s container.Unlike with gas, liquid particles are more affected by gravity, therefore making more pressure exterted on the bottom of the container than the bottom.
What three factors affect these pressures?
- Amount of particles
- Volume of container
- Temperature of particles
Define
Atomspheric pressure
Atmospheric pressure is the pressure exerted by the weight of the atmosphere, which at sea level has a mean value of 101,325 N/m²/Pa
Define
Upthrust
Upwards force exerted by a liquid or gas on an object floating in it.
How does upthurst make something float
If the density of the object is greater than the density of the fluid, the liquid cannot create enough upthrust that will hold its weight up so it sinks.However,if the upthrust is larger than the weight of the object, the object will rise.
