The calculator has a complete set of keyboard shortcuts for all of its
function buttons. If I remember, the shortcut for square root is the @ key.
I haven't experimented with the scientific notation mode.
And the calculator in Windows 7 has even more stuff, including unit
conversions, such as from meters to feet, pounds to kilograms, etc.
Lloyd Rasmussen, Kensington, Maryland
Home: http://lras.home.sprynet.com
Work: http://www.loc.gov/nls
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Howard, W A 9 Y B W
> Sent: Saturday, January 21, 2012 8:01 AM
> To: [log in to unmask]
> Subject: Re: Math Help
>
> Mike,
>
> You can enter the scientific notation in the Windows calculator as
> follows:
>
> 1. From the view menu select "Scientific"
> 2. Press the "X" key, this allows you to enter a number in scientific
> notation.
> 3. To enter a negative power of 10, change the sign with the "F9" key
> prior
> to entering the power.
>
> So for example if you wanted to enter 50 micro henrys, you would enter the
> following sequence:
>
> "50" "X" "F9" "6"
>
> The display on your calculator would show the following:
>
> "50.E-6"
>
> To take the square root of the L multiplied by C do the following:
>
> 1. Using the JAWS cursor, navigate to a button labeled "INV" near the top
> of the calculator in the row above the 7 8 9 and do a left mouse click.
> This button does an inverse function on the next key press and only
> remains
> on for the key pressed immediately following the press of the "INV"
> button.
>
> 2. Navigate down the calculator keyboard with the JAWS cursor and locate
> a
> button labeled "X^2" and left click on this button and you will have taken
> the square root of the number in the display. The "X^2" is in the
> bottom
> row of buttons. The "X^2" button squares a number if not proceeded by the
> press of the "INV" button first.
>
> Try this square root function on several numbers that you know the square
> root of such as 100, 81, 64, 16, or 4 so you know you are doing it
> correctly.
>
> I hope this helps.
>
> 73's
>
> Howard #3, W A 9 Y B W
>
> ----- Original Message -----
> From: "Mike Keithley" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, January 20, 2012 9:45 PM
> Subject: Re: Math Help
>
>
> > This sounds right, but I know that trying to enter this into a speech
> > calculator I have is impossible because it won't accept scientific
> > notation. And I couldn't figure out how to do it in the windows
> calculator
> > either.
> >
> > ----- Original Message -----
> > From: David thurmond <[log in to unmask]>
> > To: [log in to unmask]
> > Date: Wednesday, Jan 18, 2012 05:29:31
> > Subject: Math Help
> >
> >>
> >>
> >> All,
> >>
> >> Sorry for my previous post, I previously stated that 1 picofarad = 1 x
> >> 10 ^ -9 Farad, which is why my calculation was wrong. I also screwed
> >> up entering the units on the calculator, so I should have
> >> double-checked my work! I believe this is correct, however:
> >>
> >> The formula is:
> >>
> >> Resonant Frequency (Hz) = 1 / (2pi * sqrt(L C)
> >>
> >> where L is in Henries and C is in Farads. So, in your example:
> >>
> >> 1. Convert 50 microHenries to Henries, 1 microHenry = 1 x 10^-6
> >> Henries, so 50 microHenries = 5.0 x 10^-5 Henries.
> >> 2. Convert 200 picofarads to Farads. 1 picofarad = 1 x 10^-12 farads,
> >> so 200 picofarads = 2 x 10 ^ -10 Farads.
> >> 3. Now, plug into the formula:
> >> F = 1 / (2pi * sqrt (5 x 10^-5 times 2 x 10 ^ -10)
> >> = 1 / 2pi * 1 x 10^-7
> >> =1591557 Hz
> >>
> >> Hopefully this is correct now, and hopefully I did more than just
> >> muddy up the waters beyond all hope! My apologies!
> >>
> >> So you can see, the worst part of this problem is getting the units
> >> correct, at least for me.
> >>
> >> 73,
> >>
> >> David Thurmond, KK4ADV
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