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Chemical
Radioactive decay
The calculator calculates how much radioactive material remains after a certain period of time.
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Chemical
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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Chemical
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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Chemical
Molar concentration of mass and volume
Calculator allows to determine the molar concentration of the solution.
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Math
Number of tetrahedral
Tetrahedral numbers are the natural numbers, for which it is possible to construct a tetrahedron formnego of bullets. They are a special case of the pyramidal numbers.
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Verifiers
Verifier numbers EAN-13 preview
Verifier numbers EAN-13
Calculator allows you to verify the number entered EAN-13.
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Life
Western and Chinese astrological signs (zodiac)
For a given date of birth calculator calculates the corresponding Western and Chinese astrological sign (zodiac).
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Building
Calculator floor panels
Calculator based on the dimensions of the area to put the panels and occupancy data on number of panels in one package, calculate how much you have to buy packages of panels to cover the entire room.
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Health
Iron deficiency
The calculator calculates the dose of iron necessary to adopt a parenteral route to compensate for the normal level of the common deficiency.