The DC motor was the mainstay of electric traction drives on both electric and diesel-electric locomotives, street-cars/trams and diesel electric drilling rigs for many years. The introduction of DC motors and an electrical grid system to run machinery starting in the 1870s started a new second Industrial Revolution.
One acre is 43,560 sq ft. One half acre is 21,780 sq ft. However, that doesn't help most people much when trying to picture how large a lot is. Half acre lot is roughly:
Report Abuse. It all depends on the size of your front yard and the dimensions of your house. A half an acre is 21,780 sq feet. With a 1500 sq ft house, you should have plenty of room for your kids and dogs to play.theoriginator Â· 8 years ago.ust trying to figure out if a house is on a half acre of land, how much space of a backyard would i have. is it big enough for my two big dogs to run around and my kid to play around freely. how many thing will i able to put in my back yard. can i build a deck and sill have room to put a swing and more in my back yard.