explain why it is easier to separate a solid from another solid compared to a liquid from another liquid

it is because solid is.in a fixed shape so it is easier to separate a solid from another solid compared to a liquid from another liquid

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

well in order to answer this question you have to provide more information < 3