What can block light by placing obstacles in this path , but it much more difficult to block sound why

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.