electroscope
an Electroscope
It is an electroscope. If you lightly touch the object to the electroscope, it either sticks it together or pops it apart if it is charged.
a zapping device is like a taser it can send a electric impulse into something like a human or animal to stun it. a electro magnetic device is something police will use to see if you have any metal or weapons on you and they are also used at airports to see if you have any metal or weapons on you to.
I do not believe that one device can help people see through walls.
an electroscope is used to determine whether an object is charged or not. However, it will not tell if the object is positively or negatively charged.
clock is type of measuring device that you can use to see the time
You use can. You need to make sure that the device is on. After open Device manager and press "Scan for hardware changes" or something like that (it depends on OS). If the device is working fine your OS will automatically install drivers for the device or you will see a device which was not recognized. You need to right click on it and choose location for the device driver.
No. It is a piece of paper that explains how to use something.
something you use to gather evidence that you cant see.
You only get charged if you have put your credit card details in and if you download something that is not free. Everything else is free. You may get receipts sent to you, but you will only have to pay if something was not free.
monitor
Put it this way - it won't work if it isn't charged. If you mean "can you keep a Windows 8 device plugged in and still use it". The answer is yes.