Fluids And Pressure Flashcards
How are fluids able to flow?
Particles can move past one another.
What is a fluid?
Any material that can flow and takes the shape of its container.
What happens when you put air into your bicycle tire?
The air particles push against each other and against the tire. The more you pump into the tire, the more air particles push on the inside of the tire.
What is pressure?
The amount of force exerted on a given area.
What is the formula for pressure?
Pressure=force/area
What is the pascal?
The SI unit for pressure.
How much is one pascal?
The force of one Newton extended over an area of one square meter. (1N/2m)
Why are bubbles shaped the way they are?
The shape if a bubble is due in part to an important property of fluids. Fluids exert pressure evenly in all directions. The air you blow into the bubble expands in every direction, so the bubble expands I. Every direction, helping create a sphere.
What causes atmospheric pressure?
The weight of the atmosphere.
What is atmospheric pressure exerted on?
Everything on earth.
How much pressure does the atmosphere exert?
The atmosphere exerts a pressure of 10 N which is about the weight of a pineapple on every square centimeter on your body.
A square centimeter is about the size of the tip of your little finger.
Why is there no pressure at the top of the atmosphere?
There is no atmosphere pressing down.
What is the buoyant force on top of mt.everest?
1/3 the force at sea level
