In North America, Japan and some of northern South America, standard power supply is within 10% of 120V at 60Hz in Europe, Australia, most of South America, Africa and Asia, and New Zealand it's 230V at 50 Hz.
120v is the standard for all of North America, whereas 240v is standard for the rest of the world.
Your 8 amp hammer drill has more power. If your hammer drill is 120V, you would multiply amps by volts to get the total watts: W= 8 x 120 = 960W.
North America uses 120V and I believe European countries run on 220V
110V and 120V are essentially the same thing--don't worry about that. 50 Hz vs. 60 Hz is more important, for some devices. North America is 60 Hz; much of the rest of the world is 50 Hz.
To determine the number of watts of electric energy consumed by electric iron, we need to multiply the volts and the ampere used by that particular electric iron, so the product of those two is the watts used by the electric iron.
I will keep the ans. simple. Yes you can. It will cause no problem.
No, in North America the plug configuration will not allow that to happen. The blade configuration for 120 volts are in parallel where as the 220 volt configuration are in tandem.
NO, unless you get a converter that converts 220 to 110.
Yes. Outside of North America, you really don't see 120v systems.AnswerMost European countries, including Spain (not 'Spane'!) and France, have nominal residential supply voltages of 230 V.
It might be easy to assume that all mains power supplies are multiples of 11 when North America uses 110V and Europe uses 220V. Despite those numbers, it's actually not quite true. Europe has now moved to 230V from 220V and UK has moved from 240V to 230V to harmonise the power supply across the whole of Europe. North America has a voltage that varies between 110V and 120V depending on the supplier. In some less developed countries, the mains power supply is whatever happens to arrive. A notable example is that of a small Eastern European town - its 220V power supply was normally closer to 175V and would fluctuate wildly during the day.
Watts = amps x volts. Your drill draws 4.2 x 120 = 504 watts. I have never seen a battery with AC 60 Hz specs. If it is an inverter that you are talking about and the output is only 100 watts then it is under size for the job you want it to do.