A wind turbine has an efficiency of 55% how much energy is required from the turbines to generate 750 J of electrical energy

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.