8. A large explosion is heard by two people. The first is located 10 meters away and the second is located 40 meters away. By which factor is the intensity of the second observer compared to the first?
a.) 16
b.) 4
c.) 1/4
d) 1/16
e.) 1/900
Ever heard of the inverse square law? If "intensity" means power per area, the inverse square law applies. The second observer is four timnes farther away.