Which property below will be the best one to use to most accurately identify a pure substance because it is unique to each pure substance? hardness

brittleness

odor

density

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

6.4 cm (max) - 25 cm (min)