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HOW TO REMEMBER FORMULA AND CALCULATOR?
Try INVBAT.COM
INVenting Brain Assistant Tools
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Demonstration on how to use your smartphone as your formula and calculator tool
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VOICE DATA ENTRY
valid only for smartphone with microphone icon.
Touch clear button. Next touch any white button. Next touch microphone icon 
. Next speak numbers only.
For decimal use the word "point" example say, "thirteen point seventy five" . Then touch the Solve button.
POWER CONVERSION CALCULATOR
hp
= Btu / min
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hp
= W, watt
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hp
= (ft-lbf)/min
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hp
= (ft-lbf)/sec
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hp
= ton of refrigeration
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btu/hr
= ton of refrigeration
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kW
= ton of refrigeration
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kW
= hp
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btu/hr
= hp, motor
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btu/hr
= hp, boiler
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btu/hr
= W, watts
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btu/hr
= (ft-lbf)/sec
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cal/sec
= W, watts
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J/sec
= W, watts
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