Awave traveling in water has a frequency of 250 hz and a wavelength of 6.0 m. what is the speed of the wave

Are aliens real? justify you’re answer.

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.

Work = force × a. work b. energy c. distance d. momentum