The power used up by any electrical load is . . .
(voltage across the load) x (current through the load) or (voltage across the load)2/(resistance of the load) or (current through the load)2 x (resistance of the load). These are all completely equivalent, and you have your choice of which one
to use, depending on which numbers you know or can measure.
power divided by distance
How to caculated arr at front office
length times width
Power is defined as Work divided by Time. Typically, work is caculated using in Joules and Time in seconds. 1 Joule per second is 1 Watt, the unit of power in the International System of Units.
momentum equals mass times velocity:]
Pi is the ratio of the circumference of a circle to it's diameter,
The atomic mass of an atom is the sum of the protons and neutrons present.
Area = pi*radius squared and measured in square units