12. A falling ball of mass 0.5 kg experiences a downward force due to gravity of mg (where g= 9.8 m/s2) and an upward force of air resistance equal to 3.5 N. What is the ball's
acceleration in units of m/s??
+/-

answer: point c: b. 1/2 potential, 1/2 kinetic, point a: 3/4 of its potential energy, point d or b: 3/4 potential, 1/4 kinetic

explanation: i cant explain. it's difficult to explain.

where are the vectors ?

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.