A boy with a mass of 65.0 kg stands on the floor and pushes horizontally against a wall. The wall pushes on the boy with a force of 100 N. Draw a force diagram including all of the forces on the boy. Determine a. The gravitational force on the boy by the earth.
b. The normal force on the boy by the floor.
c. The frictional force on the boy by the floor.

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.