You and your friend throw balloons filled with water from the roof of a several story apartment house. You simply drop a balloon
from rest. A second balloon is thrown downward by your friend 2.2 s later with an initial speed of 43.12 m/s. They hit the ground simultaneously. How high is the apartment house? The acceleration of gravity is 9.8 m/s 2 . Neglect air resistance. Answer in units of m.
The absorption spectrum would have all the wavelengths of the light source but would have black lines where the two red and one orange lines were in the emission spectrum