18. If one ball with a momentum of 50 kg. m/s hits a ball at rest and no other forces are acting on either ball, what's
the total momentum of both balls after the collision?
O A. O kg. m/s
O B. 50 kg. m/s
O C. 25 kg. m/s
O D. 100 kg. m/s

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)