Unit Conversion Notes Flashcards

Vocabulary flashcards covering unit conversions, dimensions, systems of measurement, prefixes, and physical constants based on the lecture notes.

Dimensions

Characteristics used to describe any physical quantity.

Units

Magnitudes assigned to dimensions.

Primary or Fundamental Dimensions

Basic dimensions such as mass ($m$), length ($L$), time ($t$), and temperature ($T$).

Secondary or Derived Dimensions

Dimensions expressed in terms of fundamental dimensions, such as velocity ($v$), acceleration ($a$), and energy ($E$).

International System (SI)

The metric system of units incorporating base and derived standard units such as meter, kilogram, and Newton.

English Engineering System / USCS

United States Customary System of units utilizing terms such as feet, pound mass, and pound force.

Fathom

A unit of length equal to $6 \text{ feet}$.

Furlong

A unit of length equal to $220 \text{ yards}$.

Cable

A unit of length equal to $120 \text{ fathoms}$.

Micron

A unit of length equal to $10^{-6} \text{ meter}$.

Mil

A unit of length equal to $10^{-3} \text{ inch}$.

Angstrom

A unit of length equal to $10^{-10} \text{ m}$.

Surveyor's Chain

A unit of length equal to $66 \text{ feet}$.

Surveyor's Link

A unit of length equal to $7.92 \text{ inches}$.

Hand

A unit of length equal to $4 \text{ inches}$.

Pace

A unit of length equal to $30 \text{ inches}$.

Rod

A unit of length equal to $5.5 \text{ yards}$.

Span

A unit of length equal to $9 \text{ inches}$.

Acre

A unit of area equal to $43,560 \text{ sq. ft.}$ or $160 \text{ sq. rods}$.

Are

A unit of area equal to $100 \text{ sq. m.}$.

Hectare

A unit of area equal to $10,000 \text{ sq. m}$.

Section (US)

A unit of area equal to $1 \text{ sq. statute mile}$.

Township (US)

A unit of area equal to $36 \text{ sq. statute miles}$.

Stere

A unit of volume equal to $1 \text{ cubic meter}$.

Bushel (US)

A volume unit equal to $2,150.42 \text{ cubic inches}$.

Bushel (UK)

A volume unit equal to $2,219.36 \text{ cubic inches}$.

Slug

A unit of mass equal to $32.2 \text{ lbm}$.

Mass (Avoirdupois)

A system of mass measurement used for general weighing.

Mass (Troy)

A system of mass measurement used specifically for precious metals and gems.

Carat

A troy unit of mass equal to $3.086 \text{ grains}$.

Pennyweight

A troy unit of mass equal to $24 \text{ grains}$.

Peck

A dry capacity measure equal to $8 \text{ quarts}$.

Bushel (Dry Measure)

A dry capacity measure equal to $4 \text{ pecks}$.

Revolution (rev)

An angular measure equivalent to 360 \text{ degrees} = 2\times\text{\pi} \text{ radian} = 6400 \text{ mil} = 400 \text{ gon or centesimal degree}.

Zodiac Sign

An angular measurement equal to $30 \text{ degrees}$.

Board Foot

A wood measure unit equal to $1 \text{ cu. ft.}$.

Cord Foot

A wood measure unit equal to $16 \text{ cu. ft.}$.

Cord

A wood measure unit equal to $8 \text{ cord ft.}$.

Newton (N)

The SI unit of force equal to $1 \text{ kgm}\times\text{m/s}^2$ or $10^5 \text{ dynes}$.

Pound Force (lbf)

A unit of force equal to $32.2 \text{ lbm}\times\text{ft/s}^2$, $4.4482 \text{ N}$, or $32.2 \text{ poundal (pdl)}$.

Kip

A force unit equal to $1000 \text{ lbf}$.

Pascal (Pa)

The SI unit of pressure equal to $1 \text{ N/m}^2$.

Standard Atmosphere (atm)

A pressure unit equal to $101.325 \text{ kPa} = 14.696 \text{ psi} = 760 \text{ mm Hg} = 760 \text{ Torr} = 1.0332 \text{ kgf/cm}^2$.

Bar

A unit of pressure equal to $100 \text{ kPa}$.

Poise

A unit of absolute viscosity equal to $1 \text{ dyne}\times\text{s/cm}^2$.

Kinematic Viscosity Unit

Expressed in units of $\text{m}^2/\text{s}$.

British Thermal Unit (Btu)

A unit of energy equal to $1055 \text{ J}$ or $778 \text{ ft}\times\text{lbf}$.

Erg

A unit of energy equal to $10^{-7} \text{ J}$.

US Therm

A unit of energy equal to $10^5 \text{ Btu}$.

Horsepower (hp)

A unit of power equal to $746 \text{ W}$, $33,000 \text{ ft}\times\text{lbf/min}$, or $2545 \text{ Btu/hr}$.

Boiler Horsepower

A power unit equal to $9.81 \text{ kW}$.

Ton of Refrigerant (TOR)

A cooling power unit equal to $3.516 \text{ kW}$ or $12,000 \text{ Btu/hr}$.

Hertz (Hz)

The SI unit of frequency equal to $1 \text{ cycle / second}$.

Energy Efficiency Ratio (EER) Relationship

The conversion from COP to EER given by $\text{EER} = 3.412 \times \text{COP}$.

Volt

The electrical unit defined as $1 \text{ Joule/Coulomb}$.

Ampere

The electrical unit defined as $1 \text{ Coulomb/second}$.

Ohm

The electrical unit defined as $1 \text{ Volt/Ampere}$.

Tesla

The magnetic flux density unit equal to $1 \text{ Newton/ (Ampere}\times\text{meter)} = 1 \text{ Weber/meter}^2$.

Knot

A unit of speed equal to $1 \text{ nautical mile per hour} = 1.852 \text{ kph} = 1.151 \text{ statute miles/hour}$.

Earth Gravitational Acceleration (g)

The standard gravitational acceleration on Earth equal to $9.80665 \text{ m/s}^2 = 32.2 \text{ ft/s}^2$.

Moon Gravitational Acceleration (g)

The gravitational acceleration on the Moon equal to $1.67 \text{ m/s}^2 = 5.47 \text{ ft/s}^2$.

Gravitational Constant (gc)

A dimensional conversion factor equal to $32.2 \text{ lbm}\times\text{ft/(lbf}\times\text{sec}^2)$.

Universal Gravitational Constant (G)

A fundamental constant equal to $6.673 \times 10^{-11} \text{ N}\times\text{m}^2/\text{kg}^2$.

Avogadro's Number

A physical constant equal to $6.022 \times 10^{23} \text{ mol}^{-1}$.

Boltzmann Constant

A physical constant equal to $1.3807 \times 10^{-23} \text{ J/K}$.

Stefan-Boltzmann Constant

A physical constant equal to $5.67 \times 10^{-8} \text{ W/m}^2\times\text{K}^4$.

Planck's Constant

A physical constant equal to $6.6256 \times 10^{-34} \text{ J}\times\text{s}$.

Faraday Constant

A physical constant equal to $96485 \text{ C/mol}$.

Absolute Zero

The lowest possible temperature limit equal to $0 \text{ K} = -273 \text{ }^\text{o}\text{C}$.

Mechanical Equivalent of Heat

The conversion factor between mechanical work and thermal energy equal to $4.186 \text{ J/cal}$.

Volume of Ideal Gas (STP)

The molar volume of an ideal gas at standard temperature and pressure equal to $22.4207 \text{ m}^3/ \text{kg}\times\text{mol}$.

Latent Heat of Vaporization (water)

The energy required to vaporize water at $1 \text{ atm}$ equal to $2256.5 \text{ kJ/kg}$.

Latent Heat of Fusion (water)

The energy required to melt ice at $1 \text{ atm}$ equal to $334 \text{ kJ/kg}$.