of course. go to the market and buy a transformer. It will convert a 110V supply to a 220V supply.
nothing
Yes it will. The only thing that you have to keep in mind is that in Angola the power is 220V so U'll need a power brick with 220v. Or U can buy a power converter to convert 220v to 110v.
Yes. If the computer power input is only rated for 110V input, you can power it from 220V by using a voltage converter from 220V to 110V with appropriate wattage. Some computer power supplies also have a switch for setting 110V/220V in which case computer can be powered from 220V after changing the setting. Most of the portable computers/laptops have power adapters which are rated for universal voltage (e.g. my Dell laptop AC adapter is rated for 100-240V 50-60Hz).
Power is current times voltage, so a current of 0.5 amperes and a voltage of 220v across a bulb will yield a power of 110 watts.
No
If you connect 110V xbox one to a 220V outlet, only the power supply will burn and not the Xbox one.
As the waffle maker is a totally resistive load there will be no problem using the different supply.
The power-bar must be plugged into the correct voltage it was designed for.
25w
DC 12V power supply can convert 110/220V AC power source to 12V DC.
Phase, if you are referring to line, as power line from pole.
Nothing happens. The stereo has a transformer that converts the power to DC, and 50 or 60 Hz input makes no difference.