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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

Enthalpy calculator is used to calculate the heat transfer during the process kwazistatycznego occurring in a closed thermodynamic system under constant pressure (isobaric process).      
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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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How do I calculate vacation? Calculator dimension leave in Poland

jak wyliczyć urlop wypoczynkowy? jak obliczyć urlop? jak się liczy urlop wypoczynkowy?
Calculator by entering the type of secondary education and the start and end dates of employment shall calculate the chargeable period of annual leave.                  
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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.                      
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Calculator spending on cigarettes

Calculator based on the price quoted for the package and the amount consumed per month package, gives the annual cost of smoking cigarettes.
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Section properties of square tubing

Calculator to the data gives the properties of the square tube.                    
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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.