15. A stone is dropped from a height of 49 m. Two seconds later, a similar stone is thrown downward from the same height. If the two
stones hit the ground at the same time, what was the approximate
initial velocity of the second stone?
(A) -15 m/s
(B) -25 m/s
(C) -35 m/s
(D) 45 m/s
(E) -55 m/s

it should be -8.6 cm hope this out

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

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.