How is air pressure related to elevation?

Adelivery truck leaves a warehouse and travels 2.60 km north. the truck makes a left turn and travels 1.25 km west before making another right turn to travel 1.40 km north to arrive at its destination. what is the magnitude and direction of the truck's displacement from the warehouse?

What is the fate of the electrons that interact with a specimen in an electron microscope?

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's