If you push in a door one force is directed into the door . according to newtons 3rd law what is the direction of the second force
a. towards the floor
b. towards the ceiling
c. into the door
d. into your hands

Will you chech and finish these for me, because i am stumped with them.

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

Apropagating wave in space with electric and magnetic components. these components oscillate at right angles to each other. it may travel in a vacuum. determine the term.