That is impossible. That are different things.
Kilowatthours was created in 1998.
Kilo = 1000. Watts the produce of Amps x Volts. One hour is not divided up into kilowatt hours, it is the use of 1000 watts over a period of one hour.
Use a full wave bridge rectifier.
kilowatthours
The ohms will usually stay the same unless the Amps are somehow effecting the temperature. The Amps will always change with the volts.
I Can Not answer. It is my question.
If the power output remains constant at 305 kW, doubling the voltage from 240V to 480V will halve the current drawn by the system. This change in voltage will not change the power output; it will remain at 305 kW.
This would be 30 watthours, or 0.030 kilowatthours
energy = power * time = 20w * 1hr = 20 watthours or 0.02 kilowatthours
mAh (Milliampere-hours) and volts are two different measurements in electricity. mAh represents the capacity of a battery to store energy, while volts represent the electrical potential difference. There is no direct conversion between mAh and volts as they measure different aspects of the electrical system.
THEY ARE PROBABLY ONE AND THE SAME The key is that Europe is 220 volts and USA is 120 volts. The plugs also have different shapes. Therefore, the "gadget" must change the voltage AND change the prong configuration.
You don't. Voltages are a nominal rating. 110 volts is within the nominal range at this potential. The voltage centre line is 115 volts. Utility companies are mandated to keep voltages locked within 5% of a centre line voltage. This means that it could be as high as 115 + 5% = 120.75 volts and as low as 115 - 5% = 109.25 volts