Author Question: Glass panes are opaque to a certain type of radiation, which can cause sunburn. What type of ... (Read 49 times)

sc00by25 · **on:** Jul 28, 2018

Glass panes are opaque to a certain type of radiation, which can cause sunburn. What type of radiation is it? This radiation is important in ozone layer reactions.
a. gamma
c. X-ray
b. ultraviolet
d. microwave

Question 2

You stand by the railroad tracks as a train passes by. You hear a 950-Hz frequency when the train approaches, which changes to 820 Hz as it goes away. How fast is the train moving? The speed of sound in air is 340 m/s.
a. 14.0 m/s
c. 25.0 m/s
b. 20.0 m/s
d. 37.8 m/s