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How far was struck by lightning

Calculator based on the specified time from seeing lightning until you hear thunder in the distance calculated discharge occurred.          

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Calculate how much you drink pure ethanol

On the basis of the data entered, the amount of drink and the percentage of alcohol content calculator calculates pure ethyl alcohol that we consume.
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Battery charging time calculator

Calculator to the data calculates the estimated time of charging.            
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Consumption Calculator mortar and grout

The calculator calculates the approximate consumption of mortar and grout when laying tiles on the given area , taking into account the amount of work gear tooth , tile size and the width and depth of the weld.                        
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The distance calculator between cities Polish

Calculator helps you calculate the distance in a straight line between two selected major Polish cities.      
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Insulation of wall

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Calculator allows you to calculate the amount of insulation panels needed to cover the walls of the building using the "light wet" or "dry light" methods.
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Number of square-triangle (square triangular number)

Number of square-triangle has the properties of a square and a triangular number.