19. The optimizes airflow, keeps cylinder pressure in a certain range, and determines the engine's operating range. O A. push rod
B. valve timing
C. intake manifold
D. valve lift

Who wants brainliest and free answer this question correctly and i got you. if you're found to be at fault in you'll be required to attend a traffic collision avoidance course. a. one crash in the first year after getting your license b. a collision involving a police officer c. two crashes in two years d. three crashes in three years

What is tge speed of sound in dry air at 0°c

Why is the road most slick when it first begins to rain? a. oils the road has absorbed begin to float. b. the water has not had time to run off. c. a higher concentration of dirt makes the road more slick. d. none of the above