Which of the following is an example of refraction?

you are able to see yourself in a mirror.
you can hear a smoke alarm located in the hallway from your bedroom.
you try to pick up a shell in the water, but it isn't where it appears to be.
the speed of your car is determined using radar.

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative