Write a short paragraph comparing the similarities and differences of the universal forces. Discuss the distances over which the forces act and whether each force attracts, repels, or can do either.
You may comment that the electromagnetic force is both attractive and repulsive while the other
three forces are only attractive. You may also comment that magnetic and gravitational forces act
over all distances while the strong and weak nuclear forces only act over short distances.

If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance. what is its vertical displacement (in m) after 6 s?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.