1
a nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or liquid
what is fluid?
the further down through the atmosphere you go, the ______ the pressure is
what is greater?
the amount of matter in a given volume, or mass per unit volume
what is density?
the principle that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces.
what is archimedes' principle?
the principle that states that the pressure in a fluid deceases as the fluid's velocity increases
what is bernoulli's principle
the amount of force exerted per unit area of a surface
what is pressure?
there is _____ pressure at lower levels of the atmosphere
what is more?
because there is less air inside the straw, the pressure inside the straw is _____
what is reduced?
an object is ____ up until the part of the object underwater displaces an amount of water that equals the objects entire weight
what is buoyed up?
an upward force on an object that moves in a fluid
what is lift?
the SI unit of pressure
what is pascal or Pa?
if you travel to higher/lower points in the atmosphere, the fluids in your body have to adjust to maintain _____
what is equal pressure?
the air in your lungs flows from a region of ____ pressure to ____ pressure
what is high to low?
most substances are _____ dense than air
what is more?
the pushing or pulling force exerted by the engine of an aircraft or rocket
what is thrust?
the pressure caused by the weight of the atmosphere
atmospheric pressure
water pressure increases as depth ____
what is increase?
air pressure outside the tornado is ____ than the pressure ____ the tornado
what is higher and inside?
ships are built with a ____ shape which increases the ____ of the ship
what is hallow and volume?
a force parallel to the velocity of the flow; it opposes the direction of an aircraft and, in combination with thrust, determines the speed of the aircraft
what is drag?
at the top of the atmosphere, pressure is almost _____
what is nonexistent?
water pressure does not depend on the ______ amount of fluid present
what is total?
the upward force that keeps an object immersed in or floating on a liquid
what is buoyant force?
a tank that opens to allow sea water to flow in for divers to control how ____ the submarine is
what is ballast tank and dense?
the principle that states that a fluid in equilibrium contained in a vessel exerts a pressure of equal intensity in all directions
what is pascal's principle?