Accepted units for numeric value with units

Unit system information

In the lists of supported units in the sections below, the first column provides information about the unit system.

Unit systems are shown as either:

SI for International System of Units (metric) or US for U.S. Customary System
SI and US, if available for both

If several codes are supported for the same unit, and all codes use the same unit system, the unit system is shown only once.

However, if codes have different unit systems, a unit system is provided for each code, in the order the codes are listed. For example, if there are three codes for one unit, and the first two codes are SI and the third is US, the designation is SI, SI, US. If all three are SI, SI appears just once.

Note: For the student view, the system automatically converts answers between units in the same unit system.

Unit prefixes

When entering the units part of an answer in the Simple Editor, you can enter any of the following supported prefixes. Students can enter these prefixes in their answers.

In the lists of supported units in the sections that follow, units that support prefixes are shown in bold.

SI prefixes are supported only on base units explicitly indicated.

Prefix	Symbol	10^n
deci	d	10^-1
centi	c	10^-2
milli	m	10^-3
micro	μ (infix = mu)	10^-6
nano	n	10^-9
pico	p	10^-12
femto	f	10^-15
atto	a	10^-18
zepto	z	10^-21
yocto	y	10^-24
deka	da	10^1
hecto	h	10^2
kilo	k	10^3
mega	M	10^6
giga	G	10^9
tera	T	10^12
peta	P	10^15
exa	E	10^18
zetta	Z	10^21
yotta	Y	10^24

Chemical activity units

Unit Name, System	Units Students Enter	Infix You Code	Notes
katal SI	kat s^(-1)	kat s^(-1)	Code catalytic activity in kat unless you specifically need 1/s.

Unit Name, System

Units Students Enter

Infix You Code

Notes

katal

SI

kat

s^(-1)

kat

s^(-1)

Code catalytic activity in kat unless you specifically need 1/s.

Concentration units

Unit Name, System	Units Students Enter	Infix You Code	Notes
Henry’s law constant units SI	mol(Latm)^(-1)	mol(Latm)^(-1)
molal (molality) SI	m mol*kg^(-1)	molal mol*kg^(-1)	You must code concentration as molal so it is not confused with m for meter. Avoid coding in base units.
molarity SI	M mol/L mol*m^(-3)	M mol/L mol*m^(-3)	Code chemical concentration in M unless you specifically need mol/L. Avoid coding in base units (mol/m^3).
mole SI	mol mole moles	mol	For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.
parts per billion SI	ppb	ppb
parts per million SI	ppm	ppm

Distance, area, and volume units

Unit Name, System	Units Students Enter	Infix You Code	Notes
angstrom SI		AA
Area SI	m^2	m^2
Area US	ft^2 in^2	ft^2 in^2
astronomical unit SI	ua au AU	ua	You must code astronomical distances as ua. ua is recognized by NIST but books tend to use au, and some even use AU. All are acceptable student input.
degree SI and US	°	deg
foot US	ft	ft
hectare SI	ha	ha
inch US	in	in
light year SI	ly	ly
liter SI	L l	L	Upper and lowercase l are acceptable student input but only use the infix L for coding.
meter SI	m	m
mile US	mi	mi
milliliter SI	mL ml	mL
parsec SI	pc	pc
radian SI and US	rad	rad
revolution SI and US	rev	rev
steradian SI and US	sr	sr
volume SI, US, US	m^3 ft^3 in^3	m^3 ft^3 in^3
yard US	yd	yd

Electrostatic units

Unit Name, System	Units Students Enter	Infix You Code	Notes
ampere SI	A amp C*s^(-1)	A amp C*s^(-1)	Code current as A unless you specifically need C*s. Only use amp in Mastering Chemistry (specifically BLB) as an alternate correct answer. Do NOT use this unit in Mastering Physics.
charge per unit area SI	Cm^(-2) As*m^(-2)	Cm^(-2) As*m^(-2)	Code charge as C unless you specifically need A*s.
charge per unit length SI	Cm^(-1) As*m^(-1)	Cm^(-1) As*m^(-1)	Code charge as C unless you specifically need A*s.
charge per unit volume SI	Cm^(-3) As*m^(-3)	Cm^(-3) As*m^(-3)	Code charge as C unless you specifically need A*s.
current density SI	A*m^(-2)	A*m^(-2)
debye SI	D	D
electric charge SI	C A*s	C A*s	Code charge as C unless you specifically need A*s.
electric field SI	NC^(-1) Vm^(-1) V/m kgmA^(-1)s^(-3)	NC^(-1) Vm^(-1) V/m kgmA^(-1)s^(-3)	Code electric field as either N/C or V/m. Avoid using base units.
electric flux SI	Nm^2C^(-1) Vm kgm^3(A)^(-1) (s)^(-3)	Nm^2C^(-1) Vm kgm^3(A)^(-1) (s)^(-3)	Code electric flux as either Nm^2/C or Vm. Avoid using base units.
electron charge SI	e	e
electronvolt SI	eV	eV
electrostatic unit of charge SI	esu	esu
farad SI	F CV^(-1) m^(-2)kg^(-1)s^(4)A^(2)	F >CV^(-1) m^(-2)kg^(-1)s^(4)A^(2)	Code capacitance as F unless you specifically need C/V. Avoid using base units.
megaelectronvolt SI	MeV	MeV
ohm SI	>Omega VA^(-1) m^(2)kgs^(-3)A^(-2)	Omega VA^(-1) m^(2)kgs^(-3)A^(-2)	Code resistance as Omega unless you specifically need to use V/A. Avoid using base units.
resistivity SI	Omegam m kgs^(-3)A^(-2)	Omegam kgs^(-3)*A^(-2)	Code resistivity as Omega*m unless you specifically need the base units.
siemens SI	S AV^(-1) m^(-2)kg^(-1)s^(3)A^(2)	S AV^(-1) m^(-2)kg^(-1)s^(3)A^(2)	Code conductance as S unless you specifically need A/V. Avoid using base units.
thermal resistance SI	m^2KW^(-1) Ks^(3)kg^(-1)	m^2KW^(-1) Ks^(3)kg^(-1)
volt SI	V JC^(-1) m^(2)kgs^(-3)A^(-1) W*A^(-1)	V JC^(-1) m^(2)kgs^(-3)A^(-1) W*A^(-1)	Code electric field as V unless you specifically need to use W/A or J/C. Avoid using base units.

Unit Name, System

Units Students Enter

Infix You Code

Notes

ampere

SI

A

amp

C*s^(-1)

A

amp

C*s^(-1)

Code current as A unless you specifically need C*s. Only use amp in Mastering Chemistry (specifically BLB) as an alternate correct answer. Do NOT use this unit in Mastering Physics.

charge per unit area

SI

C*m^(-2)

A*s*m^(-2)

C*m^(-2)

A*s*m^(-2)

Code charge as C unless you specifically need A*s.

charge per unit length

SI

C*m^(-1)

A*s*m^(-1)

C*m^(-1)

A*s*m^(-1)

Code charge as C unless you specifically need A*s.

charge per unit volume

SI

C*m^(-3)

A*s*m^(-3)

C*m^(-3)

A*s*m^(-3)

Code charge as C unless you specifically need A*s.

current density

SI

A*m^(-2)

debye

SI

D

electric charge

SI

C

A*s

C

A*s

Code charge as C unless you specifically need A*s.

electric field

SI

N*C*^(-1)

V*m^(-1)

V/m

kg*m*A^(-1)*s^(-3)

N*C*^(-1)

V*m^(-1)

V/m

kg*m*A^(-1)*s^(-3)

Code electric field as either N/C or V/m. Avoid using base units.

electric flux

SI

N*m^2*C^(-1)

V*m

kg*m^3*(A)^(-1) *(s)^(-3)

N*m^2*C^(-1)

V*m

kg*m^3*(A)^(-1) *(s)^(-3)

Code electric flux as either N*m^2/C or V*m. Avoid using base units.

electron charge

SI

e

electronvolt

SI

eV

electrostatic unit of charge

SI

esu

farad

SI

F

C*V^(-1)

m^(-2)*kg^(-1)*s^(4)*A^(2)

F

>C*V^(-1)

m^(-2)*kg^(-1)*s^(4)*A^(2)

Code capacitance as F unless you specifically need C/V. Avoid using base units.

megaelectronvolt

SI

MeV

ohm

SI

>Omega

Ohm symbol (Omega)

V*A^(-1)

m^(2)*kg*s^(-3)*A^(-2)

Omega

V*A^(-1)

m^(2)*kg*s^(-3)*A^(-2)

Code resistance as Omega unless you specifically need to use V/A. Avoid using base units.

resistivity

SI

Omega*m

Ohm symbol (Omega) *m

kg*s^(-3)*A^(-2)

Omega*m

kg*s^(-3)*A^(-2)

Code resistivity as Omega*m unless you specifically need the base units.

siemens

SI

S

A*V^(-1)

m^(-2)*kg^(-1)*s^(3)*A^(2)

S

A*V^(-1)

m^(-2)*kg^(-1)*s^(3)*A^(2)

Code conductance as S unless you specifically need A/V. Avoid using base units.

thermal resistance

SI

m^2*K*W^(-1)

K*s^(3)*kg^(-1)

m^2*K*W^(-1)

K*s^(3)*kg^(-1)

volt

SI

V

J*C^(-1)

m^(2)*kg*s^(-3)*A^(-1)

W*A^(-1)

V

J*C^(-1)

m^(2)*kg*s^(-3)*A^(-1)

W*A^(-1)

Code electric field as V unless you specifically need to use W/A or J/C. Avoid using base units.

Energy and work units

Unit Name, System	Units Students Enter	Infix You Code	Notes
energy per mol SI	kWhmol^(-1) Jmol^(-1)	kWhmol^(-1) Jmol^(-1)	For student input, mol, mole, and moles are considered alternate acceptable spellings, but you should code answers using the infix mol.
energy per volume SI	JL^(-1) Jm^(-3) kgm^(-1)s^(-2)	JL^(-1) Jm^(-3) kgm^(-1)s^(-2)	Code energy density as J/L or J/m^3. Avoid using base units.
erg SI	erg	erg
foot pound US	ft*lb	ft*lb
joule SI	J Nm m^(2)kg*s^(-2)	J Nm m^(2)kg*s^(-2)	Code energy as J unless you specifically need N*m. Avoid using base units.
kilowatt hour SI	kWh	kWh
Poynting vector SI	J(m^2s)^(-1) W/m^2 kg*s^(-3)	J(m^2s)^(-1) W/m^2 kg*s^(-3)	Code the Poynting vector as W/m^2 or J/(2*m^2). Avoid using base units.

Force and pressure units

Unit Name, System	Units Students Enter	Infix You Code	Notes
atmosphere SI	atm	atm
bar SI	bar	bar
dyne SI	dyn	dyn
equilibrium intensity SI, SI, US	Nm^(-1) kgs^(-2) lb*ft^(-1)	Nm^(-1) kgs^(-2) lb*ft^(-1)	Code equilibrium intensity as N/m unless you specifically need kg/s^2.
Henry’s law constant units SI	mol(Latm)^(-1)	mol(Latm)^(-1)	For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.
kilopound US	kip kips	kip	For student input, kip and kips are considered acceptable alternate spellings.
kilopound per square inch US	ksi	ksi
millimeter of mercury SI	mmHg	mmHg
newton SI	N mkgs^(-2)	N mkgs^(-2)	Code force as N unless you specifically need kg*m/s^2.
pascal SI	Pa Nm^(-2) m^(-1)kg*s^(-2)	Pa Nm^(-2) m^(-1)kg*s^(-2)	Code pressure in Pa unless you specifically need N/m^2. Avoid using base units.
pound US	lb	lb
pounds per square inch US	psi lb*in^(-2)	psi lb*in^(-2)	Code pressure in psi unless you specifically need lb/in^2.
spring constant SI, SI, US, US	Nm^(-1) kgs^(-2) lbft^(-1) lbin^(-1)	Nm^(-1) kgs^(-2) lbft^(-1) lbin^(-1)
surface tension SI	Jm^(-2) Nm^ (-1) kg*s^(-2)	Jm^(-2) Nm^ (-1) kg*s^(-2)
torque SI	Nm kgm^2*s^(-2)	Nm kgm^2*s^(-2)	Code torque as N*m unless you specifically need the base units.
ton US	t	t	Conversion to U.S. tons; British tons are different (2240 lb).
torr SI	torr	torr	For student input, either Torr or torr are considered acceptable alternate spellings.
torsion constant SI	Nmrad^(-1) kgm^2s^(-2)	Nmrad^(-1) kgm^2s^(-2)	Code the torsion constant as N*m/rad unless you specifically need the base units.
viscosity SI	Pas Ns/m^2 kg(ms)^(-1)	Pas Ns/m^2 kg(ms)^(-1)	Code viscosity as Pas or Ns/m^2 unless you specifically need the base units.

Inverse distance measure units

Unit Name, System	Units Students Enter	Infix You Code	Notes
diopter SI	dpt m^(-1)	dpt m^(-1)	Code refractive power as dpt unless you specifically need 1/m.
wave number SI	rad*m^(-1) 1/m 1/cm	rad*m^(-1) 1/m 1/cm

Unit Name, System

Units Students Enter

Infix You Code

Notes

diopter

SI

dpt

m^(-1)

dpt

m^(-1)

Code refractive power as dpt unless you specifically need 1/m.

wave number

SI

rad*m^(-1)

1/m

1/cm

rad*m^(-1)

1/m

1/cm

Kinematic units

Unit Name, System	Units Students Enter	Infix You Code	Notes
acceleration SI and US	any supported distance per time-squared measure
acceleration due to gravity SI and US	g	grav	You must code acceleration due to gravity as grav so it is not confused with g for gram.
angular acceleration SI and US	any supported angular distance per time-squared measure
angular momentum SI, US	kgm^2s^(-1) slugft^2s^(-1)	kgm^2s^(-1) slugft^2s^(-1)
angular velocity SI and US	any supported angular distance per time measure
impulse SI, SI, US	Ns kgms^(-1) lbs	Ns kgms^(-1) lbs
miles per hour US	mph	mph
momentum SI	Ns kgm*s^(-1)	Ns kgm*s^(-1)
revolutions per minute SI and US	rpm	rpm
speed of light SI	c	c
velocity SI and US	any supported distance per time measure

Magnetism units

Because Mastering doesn’t currently accept T*m^2 as an equivalent of V*s, it’s best NOT to require students to enter a unit in webers using the numeric values with units answer type. Instead, use an alternate answer type, such as multiple choice or numeric value or symbolic expression.

Unit Name, System	Units Students Enter	Infix You Code	Notes
henry SI	H WbA^(-1) m^(2)kgs^(-2)A^(-2)	H WbA^(-1) m^(2)kgs^(-2)A^(-2)	Code inductance as H unless you specifically need Wb/A. Avoid using base units.
magnetic dipole SI	A*m^2	A*m^2
tesla SI	T Wbm^(-2) kgs^(-2)*A^(-1)	T Wbm^(-2) kgs^(-2)*A^(-1)	Code magnetic flux density as T unless you specifically need Wb/m^2. Avoid using base units.
weber SI	Wb Vs m^(2)kgs^(-2)A^(-1)	Wb Vs m^(2)kgs^(-2)A^(-1)	Code magnetic flux as Wb unless you specifically need Vs. Avoid using base units. Mastering doesn’t currently accept Tm^2 as an equivalent of V*s. See the note above this table for more details.

Unit Name, System

Units Students Enter

Infix You Code

Notes

henry

SI

H

Wb*A^(-1)

m^(2)*kg*s^(-2)*A^(-2)

H

Wb*A^(-1)

m^(2)*kg*s^(-2)*A^(-2)

Code inductance as H unless you specifically need Wb/A. Avoid using base units.

magnetic dipole

SI

A*m^2

tesla

SI

T

Wb*m^(-2)

kg*s^(-2)*A^(-1)

T

Wb*m^(-2)

kg*s^(-2)*A^(-1)

Code magnetic flux density as T unless you specifically need Wb/m^2. Avoid using base units.

weber

SI

Wb

V*s

m^(2)*kg*s^(-2)*A^(-1)

Wb

V*s

m^(2)*kg*s^(-2)*A^(-1)

Code magnetic flux as Wb unless you specifically need V*s. Avoid using base units.

Mastering doesn’t currently accept T*m^2 as an equivalent of V*s. See the note above this table for more details.

Mass, moles, and density units

Unit Name, System	Units Students Enter	Infix You Code	Notes
gram SI	g	g
kilogram SI	kg	kg
mass SI	MeV*c^(-2)	MeV*c^(-2)
mass per unit area SI	kg*m^(-2)	kg*m^(-2)
mass per unit length SI	kg*m^(-1)	kg*m^(-1)
mass/volume SI	kgL^(-1) gcm^(-3) gmL^(-1) kgm^(-3)	kgL^(-1) gcm^(-3) gmL^(-1) kgm^(-3)
molar mass SI	g*mol^(-1)	g*mol^(-1)
molar volume SI	cm^3*mol^(-1)	cm^3*mol^(-1)
mole SI	mol mole moles	mol	For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.
slug US	slug	slug
solar mass SI	M_Sun M_sun	M_Sun	M_Sun and M_sun are valid student entries for solar mass. However, code answers using the infix M_Sun.
unified atomic mass unit SI	u amu	u amu	u and Da are the official NIST standards but amu is commonly used in our books. Only use u when coding infix answers.
unified atomic mass unit (dalton) SI	Da	Da

Percent and proportion units

Unit Name, System	Units Students Enter	Infix You Code
parts per billion SI	ppb	ppb
parts per million SI	ppm	ppm
percent SI and US	%	%

Unit Name, System

Units Students Enter

Infix You Code

parts per billion

SI

ppb

parts per million

SI

ppm

percent

SI and US

%

Power and intensity units

Unit Name, System	Units Students Enter	Infix You Code	Notes
apparent power SI and US	VA m^(2)kgs^(-3)	VA m^(2)kgs^(-3)	Code apparent power as VA. Avoid using base units.
candela SI	cd	cd
decibel SI	dB	dB	For intro courses, decibels are more common than bels, so bels are not currently supported.
energy per time SI	Jmin^(-1) Jh^(-1)	Jmin^(-1) Jh^(-1)
horsepower US	hp Hp HP	hp	Use only hp when coding.
intensity SI	Wm^(-2) kgs^(-3)	Wm^(-2) kgs^(-3)	Code intensity as W/m^2 unless you specifically need the expression in base units.
lumen SI	lum lxm^(-2) m^(-2)cd	lum lxm^(-2) m^(-2)cd	Code illuminance as lum unless you specifically need lx/m^2. Avoid using base units.
luminosity SI	W J*s^(-1)	W J*s^(-1)	Code luminosity as W unless you specifically need J/s. Avoid using base units.
lux SI	lx cd*sr cd	lx cd*sr	Code luminous flux as lx. Avoid using other units. lx is not the same as cd, but is a valid student entry to avoid confusion.
Poynting vector SI	J(m^2s)^(-1) W/m^2 kg*s^(-3)	J(m^2s)^(-1) W/m^2 kg*s^(-3)	Code the Poynting vector as W/m^2 or J/(2*m^2). Avoid using base units.
reactive power SI and US	VAR m^(2)kgs^(-3)	VAR m^(2)kgs^(-3)	Code reactive power as VAR. Avoid using base units.
solar luminosity SI	L_Sun L_sun W Js^(-1) m^(2)kg*s^(-3)	L_Sun W Js^(-1) m^(2)kg*s^(-3)	L_Sun and L_sun are valid student entries for solar luminosity, but code answers using L_Sun.
watt SI	W Js^(-1) m^(2)kg*s^(-3)	W Js^(-1) m^(2)kg*s^(-3)	Code power as W unless you specifically need J/s. Avoid using base units.

Unit Name, System

Units Students Enter

Infix You Code

Notes

apparent power

SI and US

VA

m^(2)*kg*s^(-3)

Code apparent power as VA. Avoid using base units.

candela

SI

cd

decibel

SI

dB

For intro courses, decibels are more common than bels, so bels are not currently supported.

energy per time

SI

J*min^(-1)

J*h^(-1)

J*min^(-1)

J*h^(-1)

horsepower

US

hp

Hp

HP

hp

Use only hp when coding.

intensity

SI

W*m^(-2)

kg*s^(-3)

W*m^(-2)

kg*s^(-3)

Code intensity as W/m^2 unless you specifically need the expression in base units.

lumen

SI

lum

lx*m^(-2)

m^(-2)*cd

lum

lx*m^(-2)

m^(-2)*cd

Code illuminance as lum unless you specifically need lx/m^2. Avoid using base units.

luminosity

SI

W

J*s^(-1)

W

J*s^(-1)

Code luminosity as W unless you specifically need J/s. Avoid using base units.

lux

SI

lx

cd*sr

cd

lx

cd*sr

Code luminous flux as lx. Avoid using other units.

lx is not the same as cd, but is a valid student entry to avoid confusion.

Poynting vector

SI

J*(m^2*s)^(-1)

W/m^2

kg*s^(-3)

J*(m^2*s)^(-1)

W/m^2

kg*s^(-3)

Code the Poynting vector as W/m^2 or J/(2*m^2). Avoid using base units.

reactive power

SI and US

VAR

m^(2)*kg*s^(-3)

Code reactive power as VAR. Avoid using base units.

solar luminosity

SI

L_Sun

L_sun

W

J*s^(-1)

m^(2)*kg*s^(-3)

L_Sun

W

J*s^(-1)

m^(2)*kg*s^(-3)

L_Sun and L_sun are valid student entries for solar luminosity, but code answers using L_Sun.

watt

SI

W

J*s^(-1)

m^(2)*kg*s^(-3)

W

J*s^(-1)

m^(2)*kg*s^(-3)

Code power as W unless you specifically need J/s. Avoid using base units.

Radioactivity units

Unit Name, System	Units Students Enter	Infix You Code	Notes
becquerel SI	Bq Jkg^(-1) m^(2)s^(-2)	Bq Jkg^(-1) m^(2)s^(-2)	Code activity in either Bq or Ci unless you specifically need J/kg. Avoid coding activity in base units.
centimorgan SI	cM	cM
curie SI	Ci	Ci
disintegration SI	dis	dis
gray SI	Gy Jkg^(-1) m^(2)s^(-2)	Gy Jkg^(-1) m^(2)s^(-2)	Code absorbed dose in Gy unless you specifically need J/kg. Avoid coding absorbed dose in base units.
rad SI	rad	rd	You must code absorbed dose as rd so it is not confused with rad for radian.
radian SI and US	rad	rad
rem SI	rem	rem
roentgen SI	R	R
sievert SI	Sv s^(-1)*mol	Sv s^(-1)*mol	Code dose equivalent as Sv unless you specifically need mol/s.

Rates and rate constants

Unit Name, System	Units Students Enter	Infix You Code	Notes
hertz SI and US	Hz s^(-1)	Hz s^(-1)	Code frequency as Hz unless you specifically need 1/s.
rate SI	kgm^(-1)s^(-3) Mh^(-1) Mmin^(-1) Ms^(-1) molL^(-1)h^(-1) molL^(-1)min^(-1) molL^(-1)s^(-1) molm^(-3)h^(-1) molm^(-3)min^(-1) molm^(-3)s^(-1) molh^(-1) molmin^(-1) mols^(-1) Pah^(-1) Pamin^(-1) Pas^(-1) torrh^(-1) torrmin^(-1) torrs^(-1)	kgm^(-1)s^(-3) Mh^(-1) Mmin^(-1) Ms^(-1) molL^(-1)h^(-1) molL^(-1)min^(-1) molL^(-1)s^(-1) molm^(-3)h^(-1) molm^(-3)min^(-1) molm^(-3)s^(-1) molh^(-1) molmin^(-1) mols^(-1) Pah^(-1) Pamin^(-1) Pas^(-1) torrh^(-1) torrmin^(-1) torrs^(-1)	For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol. For Pa, prefix is allowed on numerator only. For student input, either Torr or torr are considered acceptable alternate spellings.
rate constant SI	L^2mol^(-2)s^(-1) Lmol^(-1)s^(-1) M^(-1)s^(-1) M^(-2)s^(-1) m^3mol^(-1)s^(-1) m^(6)mol^(-2)s^(-1) s^(-1)	L^2mol^(-2)s^(-1) Lmol^(-1)s^(-1) M^(-1)s^(-1) M^(-2)s^(-1) m^3mol^(-1)s^(-1) m^(6)mol^(-2)s^(-1) s^(-1)	For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.
volume flow rate SI	Ls^(-1) m^3s^(-1)	Ls^(-1) m^3s^(-1)

Unit Name, System

Units Students Enter

Infix You Code

Notes

hertz

SI and US

Hz

s^(-1)

Hz

s^(-1)

Code frequency as Hz unless you specifically need 1/s.

rate

SI

kg*m^(-1)*s^(-3)

M*h^(-1)

M*min^(-1)

M*s^(-1)

mol*L^(-1)*h^(-1)

mol*L^(-1)*min^(-1)

mol*L^(-1)*s^(-1)

mol*m^(-3)*h^(-1)

mol*m^(-3)*min^(-1)

mol*m^(-3)*s^(-1)

mol*h^(-1)

mol*min^(-1)

mol*s^(-1)

Pa*h^(-1)

Pa*min^(-1)

Pa*s^(-1)

torr*h^(-1)

torr*min^(-1)

torr*s^(-1)

kg*m^(-1)*s^(-3)

M*h^(-1)

M*min^(-1)

M*s^(-1)

mol*L^(-1)*h^(-1)

mol*L^(-1)*min^(-1)

mol*L^(-1)*s^(-1)

mol*m^(-3)*h^(-1)

mol*m^(-3)*min^(-1)

mol*m^(-3)*s^(-1)

mol*h^(-1)

mol*min^(-1)

mol*s^(-1)

Pa*h^(-1)

Pa*min^(-1)

Pa*s^(-1)

torr*h^(-1)

torr*min^(-1)

torr*s^(-1)

For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.

For Pa, prefix is allowed on numerator only.

For student input, either Torr or torr are considered acceptable alternate spellings.

rate constant

SI

L^2*mol^(-2)*s^(-1)

L*mol^(-1)*s^(-1)

M^(-1)*s^(-1)

M^(-2)*s^(-1)

m^3*mol^(-1)*s^(-1)

m^(6)*mol^(-2)*s^(-1)

s^(-1)

L^2*mol^(-2)*s^(-1)

L*mol^(-1)*s^(-1)

M^(-1)*s^(-1)

M^(-2)*s^(-1)

m^3*mol^(-1)*s^(-1)

m^(6)*mol^(-2)*s^(-1)

s^(-1)

For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.

volume flow rate

SI

L*s^(-1)

m^3*s^(-1)

L*s^(-1)

m^3*s^(-1)

Temperature and thermodynamic units

Unit Name, System	Units Students Enter	Infix You Code	Notes
British Thermal Unit US	BTU Btu btu	BTU	BTU, Btu, and btu are valid student entries, but code answers only the infix BTU.
degree Celsius SI	°C	>degC
degree Fahrenheit US	°F	degF
energy per mol SI	kWhmol^(-1) Jmol^(-1)	kWhmol^(-1) Jmol^(-1)	Prefix allowed only in numerator (on J). Common variation is kJ/mol. For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.
entropy SI	J*K^(-1)	J*K^(-1)
entropy per mol SI	J(molK)^(-1)	J(molK)^(-1)	For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.
joule SI	J Nm m^(2)kg*s^(-2)	J Nm m^(2)kg*s^(-2)	Code energy as J unless you specifically need N*m. Avoid using base units.
kelvin SI	K	K
latent heat capacity SI	J*kg^(-1)	J*kg^(-1)	Prefix can be used for J and kg.
molal boiling point elevation constant units SI	°C/m	degC*(molal)^(-1)
molar heat capacity SI	J(mol°C)^(-1) J(molK)^(-1)	J(moldegC)^(-1) J(molK)^(-1)	For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol.
nutritional Calorie SI	kcal Cal	kcal Cal	kcal and Cal are the same. Cal is not the same as cal.
rankine US	°R	degR
specific heat SI	cal(g°C)^(-1) J(kg°C)^(-1) J(kgK)^(-1) m^2s^(-2)K^(-1) m^2s^(-2)°C^(-1)	cal(g degC)^(-1) J(kgdegC)^(-1) J(kgK)^(-1) m^2s^(-2)K^(-1) m^2s^(-2)degC^(-1)	Prefix can be placed on J and kg.
thermal Caolorie SI	cal	cal

Time units

Unit Name, System	Units Students Enter	Infix You Code	Notes
day SI and US	d	d
hour SI and US	h hr	h	h and hr are supported as alternate student entries, but use only the infix h for coding.
minute SI and US	min	min
second SI and US	s	s
year SI and US	yr y	yr	yr and y are supported as alternate student entries, but use only the infix yr for coding.

Torque and moment units

Unit Name, System	Units Students Enter	Infix You Code	Notes
impulse SI	kgms^(-1)	kgms^(-1)
joule SI	J Nm m^(2)kg*s^(-2)	J Nm m^(2)kg*s^(-2)	Code energy as J unless you specifically need N*m. Avoid using base units.
mass moment of inertia SI, US	kgm^2 slugft^2	kgm^2 slugft^2
moment SI	Nm kgm^2*s^(-2)	Nm kgm^2*s^(-2)
moment US	kipft kipsft kipin kipsin lbft lbin	kipft kipin lbft lbin	For student input, kip and kips are considered acceptable alternate spellings.
moment of inertia SI	m^4 kg*m^2 ft^4 in^4	m^4 kg*m^2 ft^4 in^4
torque SI	Nm kgm^2*s^(-2)	Nm kgm^2*s^(-2)	Code torque as N*m unless you specifically need the base units.

Unit Name, System

Units Students Enter

Infix You Code

Notes

impulse

SI

kg*m*s^(-1)

joule

SI

J

N*m

m^(2)*kg*s^(-2)

J

N*m

m^(2)*kg*s^(-2)

Code energy as J unless you specifically need N*m. Avoid using base units.

mass moment of inertia

SI, US

kg*m^2

slug*ft^2

kg*m^2

slug*ft^2

moment

SI

N*m

kg*m^2*s^(-2)

N*m

kg*m^2*s^(-2)

moment

US

kip*ft

kips*ft

kip*in

kips*in

lb*ft

lb*in

kip*ft

kip*in

lb*ft

lb*in

For student input, kip and kips are considered acceptable alternate spellings.

moment of inertia

SI

m^4

kg*m^2

ft^4

in^4

m^4

kg*m^2

ft^4

in^4

torque

SI

N*m

kg*m^2*s^(-2)

N*m

kg*m^2*s^(-2)

Code torque as N*m unless you specifically need the base units.