The pressure change (dP / dt), in Pascals per second in a water pipe, is inversely proportional to the square root of "t", where "t" is time in seconds. When the tap is closed, it is considered that there is no pressure in the pipe and when the tap is opened and a second elapses, the pressure is 2 Pascals. Determine the pressure 9 seconds after opening the tap.

pe = weightxheight = 2000x1000=2,000,000joules

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

grav forces affect all objects magnetic forces affect magnetic objects and electric currents