![]() ![]() The online calculator supports data entry through either a graphical button or through the use of traditional computer keyboard keys. Expressions that contain parenthesis, such as "(1+2)*3", are evaluated by noting the precedence order and entering the form as "1 2 + 3 *". For example, to evaluate the expression "1 + 2" in RPN, the user is required to enter "1 2 +" and the expression is evaluated immediately after the operator. RPN Mode RPN, which stands for Reverse Polish notation, is a stack-based notation where operators are designed to follow their operands. Expressions entered in algebraic input mode are done in a manner that closely resembles the natural form of the expression and the order of the operations is determined by operator precedence and parenthesis. The calculator mode is set by clicking on the "ALG/RPN" symbol in the status bar or by changing the mode inside the menu dialog box.Īlgebraic input mode is commonly referred to as "infix notation" and is widely used by most handheld calculators. The online calculator operates in either algebraic input (default mode) or RPN input. eCalc is offered as both a free online calculator and as a downloadable calculator. Inverse Cotangent Online Hyperbolic Trigonometric FunctionsĬoordinate System Decimal To Fraction Complex Numbers Online Unit Converter Constants Library Online Solver Base ConverterĮCalc is a free and easy to use scientific calculator that supports many advanced features including unit conversion, equation solving, and even complex-number math. Try it.Windows Version Mac OSX Version View More Downloads With PhyS圜alc you can enter the entire calulation with numbers and units and get the numerical answer with the correct units. But wait, you need the answer in atmospheres! Gosh, this seems like a lot more work than it needs to be. Do the number calculation on the calculator (and get 4.6), and work out the final units calculation by hand on paper. Rats! Now you have to do two calculations. So, it's 4.6 atmospheres, right? Guess again! Maybe you should write out the calculation on paper with units: Time to move on to the next problem, right? Not so fast: don't you need units on that number? Oh yeah, the question asked for the pressure in atmospheres. You pull out your calculator and plug in the numbersĪnd write down 4.6 on the exam. T is the temperature in Kelvin = 273.15 K+25.0 K = 298.15 KĪnd know that you can get the pressure using p = nRT/V. If you've studied hard you already know that you need to use the ideal gas equation of state, pV = nRT. What pressure in atmospheres does 0.078 moles of hydrogen exert on the walls of a 42.0 mL container at 25.0 ☌? Included also are the speed of light, and the mass of the electron, proton, and neutron, all with appropriate units. Using the chemical formula PhyS圜alc will give you the molar mass.īuilt into the calculator are many useful mathematical functions, as well as a number of useful physical constants. Using just the element symbol, you can retrieve atomic weights, isotope weights, and isotope abundances. PhyS圜alc has all the math functions you expect on a conventional calculator and more. Then PhyS圜alc is really designed for you. PhyS圜alc's sole ambition is to be the world's best scientific "pocket" calculator. A student using PhyS圜alc soon understands the connections between the base SI quantities and all the derived quantities. With PhyS圜alc you’ll know right away that you entered the calculation wrong because the result will have the wrong units.Īs a teaching tool PhyS圜alc offers students better insights in the concepts of physical quantity, dimensionality, and units. A conventional calculator will also give you a numerical answer, even if you accidentally multiplied instead of dividing. Not only does PhyS圜alc save you time, it also saves you from mistakes. This means you can enter and read through the entire expression in full before calculating the result, helping you quickly identify and fix any input errors. PhyS圜alc uses a natural infix notation for calculations. Can't remember a unit symbol? PhyS圜alc helps you find and append commonly used units onto a number. PhyS圜alc is quick to learn and easy to use. This allows you to get numerical answers in the desired unit in a fraction of the time you'd spend on a conventional calculator. It even knows physical properties for elements and isotopes in the periodic table. On top of this great simplification, PhyS圜alc knows every fundamental physical constant. How is PhyS圜alc different from other calculators? It allows you to include unit symbols in your calculations, obtaining the answer in the desired unit without those extra unit conversion steps. Meet PhyS圜alc-makes the others seem like slide rules. ![]()
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