What is the oxidation state of thallium in Tl2S? Provide your answer below:

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.

In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?