Flashcards in Math & Science Period 1 (CND) Deck (75)
Anything that has mass and occupies space?
A substance that cannot be chemically reduced any further?
A substance that has indefinite shape, indefinite volume & definite mass?
What kind of change is lead melting?
Separation of water into hydrogen & oxygen is what type of change?
Liquid dishwashing detergent could be classified as ?
1 cu/ft of water = to_____LBS
1 cu/ft = to _____ imp gal
6.24 imp gal
1 cu/ft = to _____ US gal
7.5 US gal
1 US gal water = to _____ LBS
1 Imp gal of water = to ____ lbs
Mercury in a glass tube could be classified as?
Cohesive or convex
The molecular attraction of the molecules to each other at the surface of the liquid is called?
The flow of solder into a joint is the result of ?
adhesion & capillary attraction
2 factors that affect the state in which matter exists?
Pressure & temp.
Relative density of mercury?
relative density of propane gas?
1ft2 = to _______ in2
1ft3 = to _______ ft3
13,6 times heavier than water?
Density of air?
.076lb/ft3 or 1.29kg/m3
1 boiler HP - to _______BTU
Relative density of water & air?
1 for water & 1 for air
The attraction between the same molecules?
The attraction between different molecules?
The ability of a liquid to rise or drop in small tubes inserted into the liquid?
A column of 1" in height exerts a pressure of ?
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
Correct definition of temperature is " A measurement of....."?
You will not have _______ flow if you do not ream the pipe.
The relationship of the mass of a substance to its volume.
The relationship between different substances?
Correct definition of heat is?
a quantity of energy
The amount of heat required to rise the temp. of one unit of mass one degree?
Specific heat capacity
Correct definition of latent heat is "Heat that causes a...."?
Change in state
Formula for converting C* to F*
F* = (1.8 x C*) + 32
Formula for converting F* to C*
C* = (F - 32) / 1.8
The standard unit (SI) for length is?
The standard unit (SI) for volume is?
Cubic Metre (m3)
The standard unit (SI) for mass is?
The standard unit (SI0 for pressure, stress, & vacuum is?
The standard unit (SI) for force is?
The standard unit (SI0 for energy is?
The numerator is ?
The top number on a fraction
The denominator is?
The bottom number on a fraction
To convert cubic feet to imperial gallons?
Multiply 6.24imp gal/ft3
To convert cubic feet to US gallons?
Multiply 7.5 US gal/ft3
Specific heat capacity of ice/steam?
.5 BTU's or 2kj
Latent heat of vaporization/condensation?
970 BTU's or 2257KJ
Latent heat of fusion/solidification?
144 BTU's or 335KJ
True or False: Heat energy always flows from the hotter object to the cooler object?
Water is most dense at?
4*C or 39*F
Heat that causes a change in temp. .only?
Specific heat capacity of water?
1 BTU or 4.2KJ
3 common states of matter?
Solid, Liquid or Gas
Heat that causes a change of state, not temp?
Latent heat of propane?
154 BTU/lb or 356 KJ/Kg
The smallest unit of an element that can still retain its properties?
Made up of molecules that contain two or more different kinds of atoms chemically joined?
Combination of different molecules but are not chemically combined?
Inch of water in height, the pressure increases to?
Foot of water in height, the pressure increases to?
Metre of height, the pressure increases to ?
Inch of mercury in height, the pressure increases to?
Atmospheric pressure is considered to be?
14.7 psia, 29.92" Hg, 101kpa or 750 mm Hg
Definition of pressure?
The force divided by the area
Definition of Force
The Amount of push or pull exerted over the entire area
Will not bend without breaking?
Maybe stretched or drawn to shape?
Can be beaten, rolled or squeezed to shape?
What happens to the volume of water as it nears the freezing point?
Correct definition of coefficient of linear expansion?
The amount a material will expand for every degree of temperature change.
Why do most solids and liquids expand when heated?
Molecules move faster and take up more space.
Insulation on piping prevents what type of heat transfer?
Mainly prevents heat losses due to conduction.