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Constants (CONST)
Your WP 34S contains a rich catalog of constants. Navigation therein works as explained
above. Names of astronomical and mathematical constants are printed on colored
background below. Values of physical constants (including their relative standard
deviations given in parentheses below) are from CODATA 2010, copied in July 2011,
unless stated otherwise. Green background denotes exact or almost exact numeric values.
The redder the background, the less precisely the particular constant is known, even by
the national standards institutes and the international scientific community.
For the units, remember
and on the other hand
Employ the constants stored here for further useful equivalences, like expressing
electron-volts
(
1
A
frequency of electromagnetic radiation via
Now here is the complete content of CONST:
Numeric value
1/2
0.5
a
d
365.242 5
a
5.291 772 109 2E-11
0
a
m
384.4E6
m
a
⊕
1.495 979E11
c
2.997 924 58E8
c
3.741 771 53E-16
1
c
0.014 387 770
2
65
The numbers printed in parentheses allow for determining the precision of results you may obtain using
these constants, through the process of 'error propagation' going back to C. F. Gauß (1777 – 1855). This
procedure is essential if your results are to be trustworthy – not only in science. Consult a suitable
reference. Yardstick measurements cannot yield results precise to four decimals.
WP 34S Owner's Manual
tesla
with
1
J
1
W
1
s
V
eV
. 6
24
e
(per definition)
m
(3.2E-10)
(1E-3)
m
(1E-6)
(per definition)
m
2
W
(4.4E-8)
m
K
(9.1E-7)
Wb
V
s
,
1
T
1
1
2
2
m
m
s
1
V
A
s
. Thus
18
), or calculating the wavelength from the
10
eV
c
, or whatever else crosses your mind.
f
Remarks
Trivial but helpful constant in some iterations.
Gregorian year
a
Bohr radius
Semi-major axis of the Moon's orbit
Semi-major axis of the Earth's orbit. Within the
uncertainty stated here, it equals 1 AU.
Speed of light in vacuum ≈ 300 000 km / s
First radiation constant
Second radiation constant
Edition 3.1
65
joule
with
1
J
1
J
2
1
1
A
m
.
T
0
4
R
c
2
h
1
c
hc
2
2
kg
m
N
m
1
2
s
joules
in
2
c
k
Page 134 of 211
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