A body is projected upwards making an angle a, with the ground with a velocity 300 m/s . Find the value of a, so that the horizontal range will be maximum. Hence find its range and time of flight.​

Over 9

Perpendicular to the wave motion 

Cannot be determined because i dont  know this but i need the points

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.