Nina and her mother both have cell phones. Nina thinks her cell phone is lighter than her mother's. If Nina wants to compare masses of the cell phones what is the best tool for her to use?

A) thermometer
B) beaker
C) balance
D) graduated cylinder

Chemistry answer as much as you can if you can't answer more then 2 don't answer

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.

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude