What are two ways a machine converts energy?

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

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.