*4. A football player with a mass of 85 kg runs to the left with a velocity of 10 m/s and collides with another football player with a mass of 95 kg and a velocity of 8 m/s to the right. What will be their momentum
after the collision?

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

How do you tell if someone actually cares about you? and just say they do?

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?