Probability; Other Functions; Unit Conversion; Physics Constants - Citizen SRP-280 Anweisungshandbuch

2 - 13

Probability

• Pressing [ PRB ] displays the probability menu. See Example 34. With
the following functions :
nPr Calculates the number of possible permutations of n item taken
r at a time.
nCr Calculates the number of possible combinations of n items
taken r at a time.
! Calculates the factorial of a specified positive integer n ,
where n≦69.
RANDM Generates a random number between 0 and 1.
RAND Generates a random number between 0 and 1.
2 - 14 Other functions ( X
• The calculator also provides reciprocal ( [ X
X
universal root [ √ ], square ( [ X
See Example 35.
2 - 15

Unit Conversion

• The calculators has a built-in unit conversion feature that enables you to
convert numbers from metric to English units and vice versa. See Example
36.
1. Enter the number you want to convert.
2. Press [ 2nd ] [ CONV ] to display the menu. There are 7 menus,
covering distance, area, temperature, capacity, weight, energy, and
pressure.
3. Use the [ ] [ ] to scroll through the list of units until a appropriate
units menu is shown, then [ ENTER ].
4. Pressing [ ] or [ ] can convert the number to another unit.
2 - 16

Physics constants

• You can use a number physics constants in your calculations. With the
following constants :
Symbol Meaning
c Speed of light
g Acceleration of gravity
G Gravitational constant
Vm molar volume of ideal gas
N Avagadro's number
A
e Elementary charge
< SRP-280 >
< SRP-285 >
, √ √ √ √ √ , , , , , √ √ √ √ √ , , , , , X
–1 X
–1
] ), square root ([√ ] ),
2
] ) and exponentiation ( [ ^ ] ) functions.
Value
299792458 m / s
9.80665 m.s
6.6725985 x 10
0.0224141 m
6.022136736 x 10
1.6021773349 x 10
E - 13
, ^ )
2
– 2
N.m kg
– 11 2 – 2
mol
3 – 1
23 mol – 1
C
–19