Why is it impossible for a solution to become both more basic and more acidic at the same time? (1 point) a
H+ and OH− ions cannot exist in the same solution.

b
An increase in H+ concentration will decrease OH− concentration.

c
H+ and OH− react to form water (H2O).

d
Acids only release hydrogen ions in the presence of bases.

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.