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Radioactive decay

The calculator calculates how much radioactive material remains after a certain period of time.      


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Calculator enthalpy

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Dilution of solutions

Legend of given volume and calculates the concentrations of the solutions before and after dilution of the volume of solution added is calculated.              
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Molar concentration of mass and volume

Calculator allows to determine the molar concentration of the solution.            
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Conversion between number bases

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Excise tax refund calculator in Poland

Calculator based on the specified value of the car, paid tax engine calculates the amount of refund of excise duty.              
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Area of ​​a rectangle

The calculator can calculate the area of a ​​rectangle.
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Field of the cylinder and

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Time of the lathe

The calculator calculates the processing time and cut the lathe on the basis of the information given workpiece.