Floaters And Sinkers Vocab Flashcards Preview

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Flashcards in Floaters And Sinkers Vocab Deck (72):
1

At a constant temperature, the volume of a given quantity of gas is inversely proportional to the pressure upon the gas.

Boyle's law

2

An upward force acting on an immersed or floating body by the supporting fluid.

Buoyancy

3

The net upward force exerted by a fluid on a submerged object.

Buoyant force

4

A property of a substance, equal to the mass divided by the volume; commonly thought of as the lightness or heaviness of a substance.

Density

5

Term applied to fluid that is moved out of the way when an object is placed in the fluid.

Displaced

6

Potential energy due to tension – either stretch (rubber bands, etc.) or compression (springs, etc.).

Elastic potential energy

7

The ability to do work. Appears in many forms, all of which are either kinetic or potential.

Energy

8

A state of balance between opposing forces.

Equilibrium

9

Anything that flows; any liquid or gas.

Fluid

10

A push or a pull. An influence on a body or system, causing or tending to cause a change in movement or shape.

Force

11

A pulling force exerted by any mass upon another.

Gravity

12

The tendency of matter to remain at rest if at rest, or, if moving, to keep moving in the same direction, unless affected by an outside (or unbalanced) force.

Inertia

13

Energy of motion. Includes heat, sound, and light (motion of molecules).

Kinetic energy (KE)

14

The amount of matter that is contained by an object.

Mass

15

The quantity of motion of a moving object, equal to the product of its mass and its velocity.

Momentum

16

Exists when the weight of the body is equal to the weight of an equal volume of the displaced fluid. The body remains suspended – neither rising nor sinking – unless acted upon by
an outside force.

Neutral buoyancy

17

Energy of position; energy that is stored and held in readiness. Includes chemical energy, such as fossil fuels, electric batteries, and the food we eat.

Potential energy (PE)

18

The force per unit of surface area; exerted perpendicular to the surface; measured in Pascals.

Pressure

19

A floating object displaces a weight of fluid equal to its own weight.

Principle of floatation

20

How fast an object is moving. The distance traveled over time.

Speed

21

The speed of something in a given direction.

Velocity

22

The relationship between buoyancy and displaced fluid: An immersed object
is buoyed up by a force equal to the weight of the fluid it displaces.

Archimedes principle

23

The amount of space enclosed by a shape or object; how much 3-dimensional space
(length, width, and height) it occupies.

Volume

24

The downward force caused by gravity on an object.

Weight

25

The force exerted on a surface divided by the total area over which the force is exerted

Pressure

26

Pressure

The force exerted on a surface divided by the total area over which the force is exerted

27

A unit of pressure equal to 1 N per square meter

Pascal

28

Pascal

A unit of pressure equal to 1 N per square meter

29

A material that can easily flow

Fluid

30

Fluid

A material that can easily flow

31

An instrument used to measure atmospheric pressure

Barometer

32

Barometer

An instrument used to measure atmospheric pressure

33

The ratio of the mass of a substance to its volume

Density

34

Density

The ratio of the mass of a substance to its volume

35

The upward force exerted by a fluid on a submerged object

Buoyant force

36

Buoyant force

The upward force exerted by a fluid on a submerged object

37

The rule that the buoyant force acting on a submerged object is equal to the weight of the volume of fluid displaced by the object

Archimedes principle

38

Archimedes principle

The rule that the buoyant force acting on a submerged object is equal to the weight of the volume of fluid displaced by the object

39

The rule that when force is applied to a confined fluid the change in pressure is transmitted equally to all parts of the fluid

Pascals principle

40

Pascals principle

The rule that the buoyant force acting on a submerged object is equal to the weight of the volume of fluid displaced by the object

41

A system that multiplies force by transmitting pressure from a small surface area through a confined fluid to a larger surface area

Hydraulic system

42

Hydraulic system

A system that multiplies force by transmitting pressure from a small surface area through a confined fluid to a larger surface area

43

What does pressure depend on?

The amount of pressure you exert depends on the area over which you exert a force

44

How do fluids exert pressure?

In a fluid all of the force is exerted by the individual particles combine to make up the pressure exerted by the fluid

45

How does fluid pressure change with elevation and death

Atmospheric pressure decreases as your elevation increases
Water pressure increases as depth increases

46

Why does pressure decrease as your elevation increases

At a higher elevation there is less air above you and therefore less air pressure

47

Why does water pressure increase the depth increases

Because the further down into the water you go, the more water there is above you, and the more it can push down on you

48

How can you predict whether an object will float or sink in a fluid?

By comparing the densities

49

What is the effect of the buoyant force

The force acts in the direction opposite to the force of gravity, so it makes an object feel lighter

50

When will an object sink in water

When it is more dense than the water or less than 1 g/cm³

51

When will an object float in water

When it is less dense than the water or less than 1 g/cm³

52

What does Pascal's principal say about change in fluid pressure

When force is applied to a confined fluid the change in pressure is transmitted equally to all parts of the fluid

53

How does a hydraulic system work

A hydrology system multiplies force by applying the force to a small surface area. The increase in pressure is then transmitted to another part of the confined fluid, which pushes on a alarmed surface area

54

The rule that the faster a fluid moves the less pressure the fluid exerts

Bernoullis principle

55

Bernoullis principle

The rule that the faster a fluid moves the less pressure the fluid exerts

56

An upward force

Lift

57

Lift

An upward force

58

How Is fluid pressure related to the motion of a fluid

Bernoulli's principle states that as the speed of a moving fluid increases the pressure exerted by the fluid decreases

59

What are some applications of Bernoulli's principle

It helps explain how planes fly, how an atomizer works, why smoke rises up the chimney, and how we flying disc glides through the air

60

A ship stays afloat as long as the buoyant force is greater than or equal to the ships ________

Weight

61

What is the SI unit of pressure called

The newtons per square meter or the pascal

62

What is force measured in

Newtons

63

Why does a helium balloon float in air

Because the although the air inside a regular balloon is under pressure is denser than the air surrounding it, the air in a helium balloon is heated and is less dense than the air around it

64

What is a piston

It is like a stopper that slides up-and-down in a tube

65

If you divide the force exerted on surface by the total area of the surface you will know the…

Pressure

66

If you divide the mass of an object by its volume you know the objects…

Density

67

Formula for pressure ?

Pressure = force/area

68

Formula for density?

Density = mass/volume

69

The weight of an object that floats has the same value as the...

Buoyant force

70

Increase in pressure on a confined fluid is transmitted equally to all parts of the fluid is known as

Pascals principle

71

The concept that the pressure of the fluid decreases as the speed of the fluid increases is known as

Bernoulli's principle

72

If you stand on 1 foot, you increase the pressure you exert on the ground because…

You have decreased the area over which the force is applied