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7Sci Chapter 19 Sec1
Forces In Fluid - Fluids & Pressure
Question | Answer |
---|---|
What is fluid? | any material that can flow and takes the shape of its container |
What is pascal? | the SI unit for pressure |
What is pressure? | the amount of force exerted in a given area |
What does force divided by area equal? | pressure |
What is measure for 1 pascal? | the force of one newton exerted over an area of one square meter |
What is atmospheric pressure? | pressure caused by the weight of the atmosphere |
What is the percentage of gases found within 10 km of Earth's surface? | 80 % |
What is gravity? | force that holds the atmosphere in place |
How many newtons are pressing on every square centimeter of your body? | 10 |
When does water pressure increase? | when depth increases |
When does water pressure and atmospheric pressure affect total pressure on objects? | when the object is underwater |
What does water pressure NOT depend on? | the amount of fluid present |
What is water about 1,000 times more dense than? | air |
What is density? | the amount of matter in a given volume, or mass per unit volume |
Which exerts more pressure, water or air? | water, because it is more dense |
What affects the shape of a bubble? |