This post is not aimed at any specific individual, just some observations. There is a lot more to AC - alternating current, than most people realize. To start with, the common everyday AC power that is used and abused by everyone is but a small subset of electronics, and electronics is a subset of physics. Our power grid is set a 60 Hz, which is but a very tiny point in the range of AC.
The theory alone behind AC is quite large, and mostly math. Two of the most important points in it are angle of rotation and it's sine, and two derivative points - ie, the numbers .707 and 1.414.
Then we get into the circuitry aspect, where frequency is just one factor in the myriad equations. Also to be considered are a host of other factors, two major ones being inductance and capacitance, and the resulting reactances.
When we start talking about motors, we must now add in the formulae from the realm of physics in the form of magnetic fields.
So it is no wonder that many people form incorrect opinions on how things work. Enough babbling, let me just say that whoever posted that a 240 volt motor will not run on 120, that's not always the case. I still have a 240 volt fan motor running on 120, and it's running at full speed. Just a matter of knowing the theory and the addition of one small component, and it's not a transformer.