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After writing E = mc2,

Einstein checked the

units (Work), and said,

"That must be right."

(It is now proven accurate to

23 decimal places.)

Magic is trick NOT explained.
With Math, each Step is Simple and Obvious. (NO Skipped Steps)

At 72 beats/min, the human heart takes how many days for a million beats?

1000000 BEAT / 72 MIN/BEAT = 13888.8888888889 MIN
13888.8888888889 MIN / 60 HR/MIN = 231.481481481481 HR
231.481481481481 HR / 24 DAY/HR = 9.64506172839506 DAY

What is light velocity per year?

186282.4 MI/SEC * 60 SEC/MIN = 11176944 MI/MIN
11176944 MI/MIN * 60 MIN/HR = 670616640 MI/HR
670616640 MI/HR * 24 HR/DAY = 16094799360 MI/DAY
16094799360 MI/DAY * 365.26 DAY/YR = 5878786414233.6 MI/YR

What is the miles/hour of earth orbiting around the sun 93 million miles away?

93000000 MI * 2 '/' = 186000000 MI
186000000 MI * 3.141592654
'/'*YR = 584336233.644 MI/YR
584336233.644 MI/YR / 365.26 YR/DAY = 1599781.61759842 MI/DAY
1599781.61759842 MI/DAY / 24 DAY/HR = 66657.5673999343 MI/HR

( Note : 'No Units' and 'Write-in Units' )

If a cubic mile rain cloud holds 1 drop/cubic foot, what is its weight in elephants?

1 MI*MI*MI/CLOUD * 5280 FT/MI = 5280 MI*MI*FT/CLOUD
5280 MI*MI*FT/CLOUD * 5280 FT/MI = 27878400 MI*FT*FT/CLOUD
27878400 MI*FT*FT/CLOUD * 5280 FT/MI = 147197952000 FT*FT*FT/CLOUD
147197952000 FT*FT*FT/CLOUD *
1 DROP/FT*FT*FT = 147197952000 DROP/CLOUD
147197952000 DROP/CLOUD / 20 ML/DROP = 7359897600 ML/CLOUD
7359897600 ML/CLOUD / 1000 L/ML = 7359897.6 L/CLOUD
7359897.6 L/CLOUD * 33.8140245 fOZ/L = 248867758 fOZ/CLOUD
248867758 fOZ/CLOUD / 128 GAL/fOZ = 1944279.36 GAL/CLOUD
1944279.36 GAL/CLOUD * 8.34541082 LB/GAL = 16225810 LB/CLOUD
16225810 LB/CLOUD / 2000 TON/LB = 8112.90499 TON/CLOUD
8112.90499 TON/CLOUD / 8 ELEPHANT/TON = 1014.11312 ELEPHANT/CLOUD

Hints *

1. 100 % Menu Button Pick : Top Menu : (Double) Click/Hold/Drag to Next (Top) Menu...
2. For Reciprocal : Click 1 'NoUnits' / Last Answer ('RCL2') =
3.
'Space' Saves ( X2M ) and 'CE' ReSets 'MRX' to last answer saved.
4. 6/49 Lottery Voluntary Tax { No Order~Repetition }1 of:
(49.006)Combinations = 13983816
5. { 0!=1!=1 }
(7.007) or (7.006)Permutions = 7! (Factorial) = 5040.
6. Safe Codes { Order, No Repetition }
(100.004)Permutions = 94109400.

... Save UnitCalc History : Right Click : 'Select All & Copy/Paste' as 'ReCalcDo.txt'.

Learners can self-solve most problems (with starting and ending units) and add units/
conversion factors in the Nifty, Automatic (Flash 5 Script) Button Generator.

The History Output IS the Input to a Script Calculation Program: 'ReCalc.exe'

* STAND ALONE ( A Computer friend can email zipped programs... 98K )

In your 'Temporary Internet Files\Content.IE5' copy 'CalcA*.swf ' and "menusA.swf " to
a folder 'UnitCalc' and Run.
be_still7@yahoo.com for the +/- UnitCalcV1.zip.