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The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.