A 7 kg suitcase and a 12 kg suitcase are dropped from the same second story window at the same time. If there is no wind resistance, which of the following sentences is true? Select one:
a. The 7 kg suitcase will hit the ground first.
b. The 12 kg suitcase will hit the ground first.
c. The suitcases will hit the ground at the same time.
d. It is impossible to predict what will happen

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

Work = force × a. work b. energy c. distance d. momentum

The average atmospheric pressure on earth is approximated as a function of altitude by the relation patm = 101.325 (1 − 0.02256z)5.256, where patm is the atmospheric pressure in kpa, and z is the altitude in km with z = 0 at sea level. determine the approximate atmospheric pressures at atlanta (z = 306 m), denver (z = 1610 m), mexico city (z = 2309 m), and the top of mount everest (z = 8848 m).