<span>Efficiency is the
measure of how efficient a process is. It is used to assess the ability of a
process in avoiding waste energy, materials, money and time in doing a
desirable output. It is calculated as;
Efficiency = useful energy ouput / total energy input</span>
<span>
.742 = useful energy / 200 J
Useful energy = 148.4 J <-----------OPTION B</span>
B. my town is powered by electricity that is generated by the energy from the flow of water through a large dam.
The water from the large dam is example of renewable energy. It can be replenished through rainfall cycle, so it is a renewable form of energy.
There are 123.56 of them. (rounded)
I think it would be answer B. a surface wave
Hey there Donnell!
The reason to why light refract when it encounters the glass in a lens would be because it slows down, which causes it to bend, this would be the reason why <span> light refract when it encounters the glass in a lens.
I hope this helps you!</span>
