Technician A says that the height-sensing proportioning valve changes its split point by means of a rotating cam. Technician B says that levers are used in conjunction with the height-sensing proportioning valve. Which technician is correct?

Pressure is a measure of force per unit area or p=f/ap=f/a. a student is checking the amount of pressure their car exerts upon the road. the car weighs 22 tons ( us short ton ). the student finds the dimensions of each tire's footprint on the road is 12.5 cm x 16.5 cm. in pounds per square inch (psi), what is the total pressure the car exerts upon the road?