Thanks to GAIA, the new diagrams created have helped scientists to learn to spot the difference in types of white dwarfs, discovering that some are dominated by which of two things?
O carbon and nitrogen
O hydrogen and helium
O beryllium and isotopes
O helium and hydrogen

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

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.

Which of the following are sources of revenue for media companies? a. direct sales to producers b. advertising and subscriptions c. online purchase d. capital investments