Fluids and pressure

Question 1

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

Answer 1

fluid

Question 2

the amount of force exerted per unit area of a surface

Answer 2

pressure

Question 3

the SI unit of pressure

Answer 3

pascal

Question 4

the pressure caused by the weight of the atmosphere

Answer 4

atmospheric pressure

Question 5

the upward force that keeps an object immersed in or floating on a liquid

Answer 5

buoyant force

Question 6

the principal 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

Answer 6

Achimese’s principal

Question 7

the principal that states that the pressure in a solid estates that the pressure in a fluid decreases as the fluids velocity increases

Answer 7

Bernoulli’s principal

Question 8

an upward force on an object that moves in a fluid

Answer 8

Lift

Question 9

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

Answer 9

Thrust

Question 10

a force parallel to the velocity of the flow; it opposes the direction of an aircraft and, in combination with trust, determines the speed of the aircraft

Answer 10

drag

Question 11

fluid in equilibrium contained in a vessel intensity in all directions

Answer 11

Pascal’s principal