Joe is standing on a bridge that spans a canyon and drops a rocks into the open space below him. Calculate the rocks speed after it has fallen for 5 seconds. Show your work.

The upward force acting on the wing of a airplane in flight is known as the "lift" force. (d)

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.

D. the index of refraction of the second medium is lower.

An adiabatic process is one which occurs without the transfer or matter or heat in a system.