Ben has two gold color nuggets that look identical. However, the density of the first nugget is 4.2 g/mL and the second is 19.3 g/mL. Are the nuggets made out of the same substance?

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.