Imagine that you have travelled to a planet that is much smaller than earth and has less gravitational pull. You have taken a block of metal with you. Compare the mass, weight, volume, and density of the object on earth and on the smaller planet

Wooden , walls ,doors ,support

Current supplied to consumers from generating plants like coal power plant, nuclear power plant, geothermal and others are in form of alternating current instead of direct current because it can be transported easily in a long distance. also, the alternating current has a wide range of frequency and the amount or energy can be increased or decreased.