an airplane flying due north 90 km/h is being blown due west at 50 km/h. what is the resultant velocity of the plane?

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.

Avoltaic cell converts chemical energy to

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?