HP 48g Graphing Calculator - Manual (Page 130)

Determine if 12 ° C is greater than 52 °F. (The > operator
interprets temperatures as levels.)
1: 1 li^fUNITSlfNXTl TEM-F'
12 = C
52 “ F
ÌPRGÌ TEST >
The result shows the test is true (12 °C is greater than 52 °F).
Calculate the final temperature for an increase of 18 “F
from the current temperature of 74 °F.
10 @(U1I1D(EHD
18 =F 74 “
li 92_"F
s
r E M P 1: .00088
“ C
Example: For a coefficient of linear expansion a of 20 x 10^® 1/°C
and a temperature change AT of 44 °C, calculate the
fractional change of length given by a AT. (The x
command interprets temperatures as differences.)
G^iUNITSlfNlrri
20 fEEXl m 6 (7^
44 “C (3
Whenever you must use absolute temperatures in a compound unit or
expression, be sure to enter the temperatures using absolute scale.
The HP 48 will not convert from °C or °F to the absolute scale
correctly once the temperature has become a part of a combined
expression.
The ideal gas equation of state is PV = nRT, where P
is the pressure exerted by the gas (in atmospheres), V
is the volume of the gas (in liters), n is the amount of
the gas (in moles), R is the ideal gas constant (0.082057
liter-atmospheres/kelvirnmole), and T is the temperature
of the gas (in kelvins).
Assuming ideal gas behavior, calculate the pressure
exerted b}^ 0.305 mole of oxygen in a volume of 0.950 liter
at 150 °C.
10-12 Unit Objects