Which phrase describes air density? increases as altitude increases Ο Ο Ο equals mass divided by volume pushes molecules in one direction exerts less pressure as it increases ♡︎PLS HELP IM TIMED PLS WILL GIVE BRAINLIEST!!!♡︎​

The correct answer is B. equals mass divided by volume

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