Physics Unit 5 Pressure

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IGCSE physics pressure
Alex Nolan
Flashcards by Alex Nolan, updated more than 1 year ago
Alex Nolan
Created by Alex Nolan over 8 years ago
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Question Answer
What is pressure? Force per unit area.
What is the unit of pressure? Pascal
What is the equation for pressure? pressure p= force/ area
can pressure be transmitted through a fluid? Yes
How does a hydraulic system work? It uses the pressure in a fluid to exert force.
The force exerted by a hydraulic system depends on the pressure and the area of the cylinder that exerts force. True or false? True
How does the pressure in a liquid increase? The pressure in a liquid increases with the depth and of density.
What is the U-tube manometer used for? To measure gas pressure
What is the mercury barometer used for? To measure atmospheric pressure.
Describe the arrangement of the molecules in a solid? Molecules in a solid are in a rigid structure.
Describe the arrangement of the molecules in a liquid? Molecules in a liquid move about in contact with each other ( loose formation).
Describe the arrangement of the molecules in a gas? Molecules in a gas are far apart and move about at a high speed.
What happens when you increase the temperature of a gas? The speed of its molecules increase
What is the pressure of the gas on a surface caused by? The molecules repeatedly hitting the surface
How does the pressure of a gas increase in a sealed container? If the gas temperature is increased.
what is the brownian motion? The eratic
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