Acar travels around a circular, horizontal road under the influence of friction. if the car doubles its speed, by what factor will the frictional force need to change in order to keep the car from sliding off the road?

ill do it for 100, also this isnt 80 its 40

they should be similar or the same

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.