If the 240V 3-phase service is 240V phase-to-phase, then you can get 240V single-phase by simply picking two phases (poles, as used in the question) and connecting the load across them. This is simply one third of a standard delta connection.
If you need 120V/240V split phase, i.e. with a neutral, as used in residential services, you will need a transformer. If the service is actually a four wire "quadraplex" service, however, you will probably already have that 120V/240V with neutral connection phase available. In this case, you will need to pick the two phases correctly in order to get the proper 120V service half.
connect the poles together
Yes, convection currents connect the poles all the way to the equator.
International Dateline
disconnect both poles, wait 5 minutes, lossen the bolt, replace your battery, tighten the bolt, connect both poles. here you go disconnect both poles, wait 5 minutes, lossen the bolt, replace your battery, tighten the bolt, connect both poles. here you go
Metaphase
YOU Can try 2 connect pluck
Yes, convection currents in the Earth's mantle connect the poles to the equator. These currents play a crucial role in the movement of tectonic plates, which in turn influences volcanic activity and earthquakes. The heat from the Earth's core is the driving force behind these convection currents.
Metaphase .
All meridians of longitude on the glob meet at the north and south poles.
I think they are some type of meridian line, but I don't know what it is called.
I'm sure this isn't what you want to hear, but you probably need to ask an electrician familiar with your service and what you want to connect. As a general answer, you can connect a 240v line to line resistive load like an electric water heater to any 240v source. If you also need the 240v to have 120v line to neutral, like a 240v electric stove that contains a 120v clock and oven light, then its possible if the 3 phase power is connected in a "high delta" configuration, and you connect to the correct leads. If you have a high delta service and want to ignore the 3-phase power service and wire most or all of the loads in the building as a single phase load, the utility may have to be consulted.
All lines of longitude meet at the poles; none pass through. No lines of latitude connect at or pass through either pole.