Does anyone know how to solve questions 6 and 7? if so could you show me how to do it

Why are pipes bursting in the in extremely cold weather?

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.

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?