Why do airplanes need to be pressurized for passenger safety when flying high in the atmosphere?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.

How do you tell if someone actually cares about you? and just say they do?