*WILL GIVE BRAINLIEST IF SOMEONE ANSWERS THIS CORRECTLY ASAP*

Which of these is an example of a physical change?

Chlorophyll in leaves forming a new compound
Photosynthesis taking place in leaves
Shredding of leaves in a machine
Burning of dry leaves in the garden

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.