An electricity company wants to reduce wasted energy across a town. For the same amount of money, they can either: Use 20% of the wasted
energy from the power station to heat their offices. Install new power
lines which only waste half the energy of the old ones. Replace all the
bulbs in the town with LED bulbs, which are 99% efficient. Explain which of
these things they should do.

the answer is b i think

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.