Two students are on a balcony 19.1 m above the street. one student throws a ball, b1, vertically downward at 13.9 m/s. at the same instant, the other student throws a ball, b2, vertically upward at the same speed. the second ball just misses the balcony on the way down.
(a) what is the difference in the time the balls spend in the air? s
(b) what is the velocity of each ball as it strikes the ground?
ball thrown downward m/s
ball thrown upward m/s
(c) how far apart are the balls 0.800 s after they are thrown?

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