A car traveling at a speed of 75.0 m/s encounters an emergency and comes to a complete stop. How much time will it take for the car to stop if
it decelerates at -8.0 m/s2?

not: both offer magnification to the atomic level.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

answer an inhibitory neurotransmitter in the brain;