1. radioactive carbon-14 has determined that a fossil is 5.7 x 103 years old. what is the total amount of
the original c++ still present in the fossil?

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.