1. Fluids and Pressure
Chapter 3-1

2. Fluids
Any material that can flow and takes the shape of its container.
Is air a fluid?
Yes-all liquids and gases are fluids.
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3. Fluids exert Pressure Air Pressure Water pressure What is pressure?
Pressure is the collision of particles = force on an object.
Amount of force = Pressure
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4. Calculate Pressure
1 Pa = 1N/m2
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5. P = 3,000N / 2m2 = 1,500Pa
F = 250 Pa x 10m2 = 2,500N
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6. Pressure and Bubbles
The shape of a bubble is due to the property of fluids which states that fluids (gases) exert pressure evenly in all directions, so a bubble is round!
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7. Air Pressure
The atmosphere is a layer of N, O2, and other gases that surround the Earth.
The atmosphere is held in place by GRAVITY
The pressure caused by the weight of the atmosphere is called-
ATMOSPHERIC PRESSUE
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8. Atmospheric Pressure
At sea level atmospheric pressure = 101,300N for every square meter OR
101,300Pa. This means there is a weight of ~10N (~2lbs) on every square cm of your body!!
Why don’t you feel this?
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9. Answer Questions 1-6
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10. Answer Questions 1-5
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11. Pressure Difference and Fluid Flow
Pressure Differences and Breathing
Pressure Differences and Tornados
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Complete 1-3 on worksheet.
Page 71: 3-10 in complete sentences