Mrs. Borunda has a sample of oxygen gas that occupies a volume of 600 L at 400 atm pressure. What will the pressure be if she increases the volume to 800 L?
300 atm
450 atm
540 atm
250 atm

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

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.