fluids and pressure

Question 1

fluid

Answer 1

a nonsolid state of matter in which the atoms or molecules are free to move past each other, as a gas or liquid

Question 2

pressure

Answer 2

the amount of force exerted per unit of a surface

Question 3

pascal

Answer 3

the SI unit of pressure

Question 4

atmospheric pressure

Answer 4

the pressure casued by the weight of the atmosphere

Question 5

bouyant force

Answer 5

the upward force that keep san object immersed in or floating on a liquid

Question 6

archimedes principle

Answer 6

the principle that states that the bouyant force on an object in a fluid is upward force equal to the weight of the volume of fluid that the object displaces

Question 7

bernoulli’s principle

Answer 7

states that the pressure is a fluid decreases as the fluids velocity increases

Question 8

lift

Answer 8

an upward force on an object that moves in a fluid

Question 9

thrust

Answer 9

pushing or pulling force exerted by the engine of an aircraft or rocket

Question 10

drag

Answer 10

force parrallel to the velocity of the flow it opposes the direction of an aircraft and in combination with thrust determines the speed of the aircraft

Question 11

pascals principle

Answer 11

states that fluid in a equilibrium contained in a vessel exerts a pressure of equal intensity in all directions