Actually they have 3. A round ground, wide neutral, and narrow hot. If it only has 2 it is an old outlet with no ground wire. If that is the case in your home, I highly suggest you connect a jumper wire from the ground screw to the white neutral wire on the silver screw to provide some protection. Do this at every outlet in the home. Replace all the outlets in your home with new ones if they are so old they do not have a ground connection.
Don't use a plugin that allows you to use more that two outlets
No, but the code as of today (2012) does require tamper proof outlets.
If they're not CO/ALR outlets, there is.
Some rooms have an outlet controlled by a light switch at the door. This is normally in bedrooms. It is possible that the switch is wired to only one of two outlets in a duplex outlet since it is easy to configure a duplex outlet to separate the bottom and top outlets.
Batteries provide Direct Current (DC) while household outlets provide Alternating Current (AC).
Typically, two.
bcoz i said so
A bident is a form of spear with two prongs.
there are two prongs clip
180
No, a bident: instrument or weapon with two prongs.
The resonance that is created by two prongs helps it vibrate longer so you have time to tune your instrument.
It is at the rear, passenger side, of the throttle body. It is also three prongs. -L
Two 20 Amp circuits with the outlets staggered so a different circuit is on two adjacent outlets. Should be GFCI protected.
Pi ( π )
Prongs are the points on a stag's antlers.
oh.