Arock that rolls off the edge of a cliff and falls to the ground will possess which of the following? a decreasing kinetic energy b decreasing potential energy c increasing kinetic energy d increasing potential energy

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.