# P11

What is pressure caused by?
Pressure is caused when objects exert forces on each other
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What can pressure also be caused by?
When a fluid exerts a force on an object in contact with the fluid
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What does pressure depend upon?
The area of contact on which the forces act, as well as the size of the force
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What is the equation for pressure?
Pressure = force/ area
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In the water experiment, why does the hole that is furthest below the level of water release a greater force of water?
Because the water pressure is greater the further down you go
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What is the rule between pressure and a horizontal line?
The pressure along a horizontal line in a liquid is constant
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What does viscosity mean?
How thick it is
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Formula for weight, mass and gravity?
Weight = mass x gravity
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What is the formula for density, volume and mass?
Mass= density x volume
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What is the formula for density, pressure, gravity and height?
Pressure= density x gravity x height
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What is the rule between density and pressure?
The greater the density of a liquid, the greater the pressure in the liquid
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What does the pressure in a liquid increase with?
Liquid depth
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What is atmospheric pressure due to?
Air molecules colliding with surfaces
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What does atmospheric pressure decrease with?
Altitdue
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Why does atmospheric pressure decrease with altitude?
Because there is less air above a given altitude
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What force is exerted on the body when you go swimming?
Upthrust
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The more an object is lowered into the water, the bigger the?
Volume of water displaced and the bigger the upthrust
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When the object is fully immersed, the volume of water displaced is equal to?
The volume of the object
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An object floats when?
Its weight is equal to the upthrust
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An object sinks when?
Its weight is greater than the upthrust
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Objects that float have what?
Less density than the density of water
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Objects that sink have what?
Greater density than water
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What does the pressure in a liquid increase with?
Density and depth
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What is the formula for pressure difference?
Height x density x gravity
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What is the formula for force difference?
Height x density x gravity x area
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What is the formual for upthrust?
Volume x density x gravity
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## Other cards in this set

### Card 2

#### Front

What can pressure also be caused by?

#### Back

When a fluid exerts a force on an object in contact with the fluid

### Card 3

#### Front

What does pressure depend upon?

#### Back ### Card 4

#### Front

What is the equation for pressure?

#### Back ### Card 5

#### Front

In the water experiment, why does the hole that is furthest below the level of water release a greater force of water?

#### Back 