Sci. 3-1 Fluids and Pressure Pages 62-67. A. Fluid- any material that can flow and that takes the shape of its container. (liquids or gases)

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Presentation transcript:

Sci. 3-1 Fluids and Pressure Pages 62-67

A. Fluid- any material that can flow and that takes the shape of its container. (liquids or gases)

B. All fluids exert pressure.

C.Pressure- the amount of force (push) exerted on a given area. Measured in Pascal. 1Pa = 1N on an area of 1 squared meter Force = Pressure x Area F = P x A

D.Atmospheric Pressure- the pressure caused by the weight of the atmosphere. 1) atmosphere exerts a pressure of about 101,300 N per sq. m or 101,300Pa 2) Air pressure varies depending where you are in the atmosphere.

E. Pressure depends on depth. The deeper down, the more pressure. F. Water pressure increases with depth because of gravity.

G. Water exerts more pressure because water is denser than air.

H. Fluids flow from regions of high pressure to low pressure.

I. Pascal’s Principle- a change in pressure at any point in an enclosed fluid will be transmitted equally to ALL parts of the fluid.

1) hydraulic devices use liquid because they cannot be squeezed into smaller spaces. Hydraulics use liquids to transmit pressure.