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Flashcards in Math & Science Period 1 (CND) Deck (75)
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1

Anything that has mass and occupies space?

Matter

2

A substance that cannot be chemically reduced any further?

Element

3

A substance that has indefinite shape, indefinite volume & definite mass?

Gas

4

What kind of change is lead melting?

Physical change

5

Separation of water into hydrogen & oxygen is what type of change?

Chemical change

6

Liquid dishwashing detergent could be classified as ?

Adhesive

7

1 cu/ft of water = to_____LBS

62.4lbs

8

1 cu/ft = to _____ imp gal

6.24 imp gal

9

1 cu/ft = to _____ US gal

7.5 US gal

10

1 US gal water = to _____ LBS

8.33 LBS

11

1 Imp gal of water = to ____ lbs

10 lbs

12

Mercury in a glass tube could be classified as?

Cohesive or convex

13

The molecular attraction of the molecules to each other at the surface of the liquid is called?

Surface tension

14

The flow of solder into a joint is the result of ?

adhesion & capillary attraction

15

2 factors that affect the state in which matter exists?

Pressure & temp.

16

Relative density of mercury?

13.6

17

relative density of propane gas?

1.5

18

1ft2 = to _______ in2

144 in2

19

1ft3 = to _______ ft3

1728ft3

20

13,6 times heavier than water?

Mercury

21

Density of air?

.076lb/ft3 or 1.29kg/m3

22

1 boiler HP - to _______BTU

33,475 BTU

23

Relative density of water & air?

1 for water & 1 for air

24

The attraction between the same molecules?

Cohesion

25

The attraction between different molecules?

Adhesion

26

The ability of a liquid to rise or drop in small tubes inserted into the liquid?

Capillary Action

27

A column of 1" in height exerts a pressure of ?

.578 oz/in2

28

What is the formula for calculating the amount of material expands or contracts?

Length of Change= Original length x Coefficient of expansion x delta T

29

Correct definition of temperature is " A measurement of....."?

Molecular movement

30

You will not have _______ flow if you do not ream the pipe.

laminar flow

31

The relationship of the mass of a substance to its volume.

Density

32

The relationship between different substances?

relative density

33

Correct definition of heat is?

a quantity of energy

34

The amount of heat required to rise the temp. of one unit of mass one degree?

Specific heat capacity

35

Correct definition of latent heat is "Heat that causes a...."?

Change in state

36

Formula for converting C* to F*

F* = (1.8 x C*) + 32

37

Formula for converting F* to C*

C* = (F - 32) / 1.8

38

The standard unit (SI) for length is?

Metre (m)

39

The standard unit (SI) for volume is?

Cubic Metre (m3)

40

The standard unit (SI) for mass is?

Kilogram (kg)

41

The standard unit (SI0 for pressure, stress, & vacuum is?

Pascal (Pa)

42

The standard unit (SI) for force is?

Newton (N)

43

The standard unit (SI0 for energy is?

Joule (J)

44

The numerator is ?

The top number on a fraction

45

The denominator is?

The bottom number on a fraction

46

To convert cubic feet to imperial gallons?

Multiply 6.24imp gal/ft3

47

To convert cubic feet to US gallons?

Multiply 7.5 US gal/ft3

48

Specific heat capacity of ice/steam?

.5 BTU's or 2kj

49

Latent heat of vaporization/condensation?

970 BTU's or 2257KJ

50

Latent heat of fusion/solidification?

144 BTU's or 335KJ

51

True or False: Heat energy always flows from the hotter object to the cooler object?

True

52

Water is most dense at?

4*C or 39*F

53

Heat that causes a change in temp. .only?

Sensible heat

54

Specific heat capacity of water?

1 BTU or 4.2KJ

55

3 common states of matter?

Solid, Liquid or Gas

56

Heat that causes a change of state, not temp?

Latent Heat

57

Latent heat of propane?

154 BTU/lb or 356 KJ/Kg

58

The smallest unit of an element that can still retain its properties?

Atom

59

Made up of molecules that contain two or more different kinds of atoms chemically joined?

Compound

60

Combination of different molecules but are not chemically combined?

Mixtures

61

Inch of water in height, the pressure increases to?

.0361 psi

62

Foot of water in height, the pressure increases to?

.433 psi

63

Metre of height, the pressure increases to ?

9.81 kpa

64

Inch of mercury in height, the pressure increases to?

.491 psi

65

Atmospheric pressure is considered to be?

14.7 psia, 29.92" Hg, 101kpa or 750 mm Hg

66

Definition of pressure?

The force divided by the area

67

Definition of Force

The Amount of push or pull exerted over the entire area

68

Will not bend without breaking?

Brittle

69

Maybe stretched or drawn to shape?

Ductile

70

Can be beaten, rolled or squeezed to shape?

Malleable

71

What happens to the volume of water as it nears the freezing point?

expands slightly

72

Correct definition of coefficient of linear expansion?

The amount a material will expand for every degree of temperature change.

73

Why do most solids and liquids expand when heated?

Molecules move faster and take up more space.

74

Insulation on piping prevents what type of heat transfer?

Mainly prevents heat losses due to conduction.

75

Which of the following is not a method of heat transfer?
1) radiation from the sun
2) radiation from a large rock
3) conduction to face cloth soaked in hot water
4) convection in a heated steel bar

Convection in a heated steel bar.