14. As the moles of salt added are increased, what
happens to the melting point of the water?

As I read and learned somewhere Oct 22, 2007, said this information— Salt lowers the freezing/melting point of water, so in both cases, the idea is to take advantage of the lower melting point. Ice forms when the temperature of the water reaches 32 degrees Fahrenheit (0 degrees Celsius).

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