2nd book chaoter 3

Question 1

A non solid state of matter in which the atoms or molecules are free to move past each other, as in a gas or 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 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 the fluid that the object displaces

Answer 6

Archimedes’s principle

Question 7

The principle that states that the pressure in a fluid decreases as the fluid’s velocity increases

Answer 7

Bernoulli’s priciple

Question 8

An upward force on an object that moves in a liquid

Answer 8

Lift

Question 9

The pushing or pulling force excreted by the engine of an aircraft or rockets

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 thrust, determines the speed of the aircraft.

Answer 10

Drag

Question 11

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

Answer 11

Pascal’s principle