Two identical stones, a and b, are thrown from a cliff from the same height and with the same initial speed. stone a is thrown vertically upward, and stone b is thrown vertically downward. which of the following statements best explains which stone has a larger speed just before it hits the ground, assuming no effects of air friction?

a. both stones have the same speed; they have the same change in ugand the same ki
b. a, because it travels a longer path.
c. a, because it takes a longer time interval.
d. a, because it travels a longer path and takes a longer time interval.
e. b, because no work is done against gravity.

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called