1. An engine converts 95% of its energy to mechanical energy. What happens to the other 5% of its energy? ————————-——————
2. The diagram to the right shows a hydroelectric power
plant.

(a) Identify the type of energy of the water behind the dam.

(b) When the water flows past the turbine, as shown in the diagram, the energy of the water behind the dam changes to what type of energy?

does anyone know or what?

wavelength divides in half and speed stays the same.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

where is the