A1500-w heater is designed to be plugged into a 120-v outlet.
what current will flow through the heating coil when the heater is plugged in? i = a
what is r , the resistance of the heater?
how long does it take to raise the temperature of the air in a good-sized living room 3.0m x 5.0m x 8m by 10 degrees c? note that the specific heat of air is 1006 j/(kg x degrees c) and the density of air is 1.20 kg/m^3.

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.

that would be because of both gravity and friction. so     c

there are no contact forces mentioned on the list of choices that you've provided.