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HP HP-67 User Manual

HP HP-67
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Function
Keys
103
36.5
77.8
77.8
@
&J
Resistance
R
in
ohms.
Reactance
X,
46.28
ohms,
available
in
displayed
X-register.
Logarithmic
and
Exponential
Functions
Logarithms
The
HP-67
computes
both
natural
and
common
logarithms
as
well
as
their
inverse
functions
(antilogarithms):
0
is
log.
(natural
log).
It
takes
the
log
of
the
value
in
the
X-register
to
base
e
(2.718...).
8
is
antilog,
(natural
antilog).
It
raises
e
(2.718...)
to
the
power
of
the
value
in
X-register.
(To
display
the
value
of
e,
press
18
is
log;o
(common
log).
It
computes
the
log
of
the
value
in
the
X
register
to
base
10.
8
is
antilog;,
(common
antilog).
It
raises
10
to
the
power
of
the
value
in
the
X-register.
Example
1:
The
1906
San
Francisco
earthquake,
with
a
magnitude
of
8.25
on
the
Richter
Scale
is
estimated
to
be
105
times
greater
than
the
Nicaragua
quake
of
1972.
What
would
be
the
magnitude
of
the
latter
on
the
Richter
Scale?
The
equation
is:
R,
=R,
—
log
xz
=
8.25
-
(log
1(1)5
)
1
Solution;
Press
Display
8.25
105
5
&
Rating
on
Richter
scale.

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HP HP-67 Specifications

General IconGeneral
BrandHP
ModelHP-67
CategoryCalculator
LanguageEnglish

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