A three-phase induction motor's RPM can be calculated using a relatively simple mathematical formula. RPM is equal to (120 x frequency)/number of poles in the motor.
Know MoreFind the frequency of the motor in hertz. Most commercial motor operate at between 50 and 60 hertz. In addition, count the number of winding poles inside the motor.
Multiply the motor's frequency by the constant 120. Using the example of a motor that operates at 55 hertz, the result would be 120 x 55 = 6600.
Take the result of the first part of the equation and divide by the number of poles in the motor. If the motor in the above example had four poles, the solution would be 6600 / 4 = 1650 RPM.
The calculation of lattice energy is indirectly calculated using the principles of the Born-Haber Cycle. The basic form of this equation is: lattice energy = formation heat - dissociation energy - atomization heat - the sum of ionization energies - the sum of electron affinity.
Full Answer >The ionic strength of a solution is a calculated using the concentration of dissolved substances in a solution along with the valence of the species in question. Ionic strength represents the relative interactions of ions with water molecules and other ions in a solution.
Full Answer >Housing benefits for United Kingdom citizens can be calculated using the benefits calculators on sites such as Entitltedto or Turn2Us. Before starting, be sure to gather information about your finances, existing benefits and taxes. If additional help is needed, you can contact a welfare rights adviser for assistance with calculating housing benefits.
Full Answer >Sales tax is calculated using a relatively straightforward formula. Take the price of the item, and multiply it by the percentage of sales tax being levied.
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