Qi. If the total supplied energy to the fan is 250 J and 200 J is usefully transferred to the kinetic
store, how much is wasted by heating?

Could someone help ?

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.