PROBLEM THREE $(6$ MARKS$)$:

Steel swords are made by heating metal, moulding it$,$ and then plunging it into oil in a process known

as quenching.

a$)$ If you were making a sword and the steel blade was $1\mathrm{.}5$ kg and at $1150\backslash$deg C when it comes out

of the forge, and you plunged it in a $50$L tank of oil $($at $22\backslash$deg C$)$ to quench the blade, what would

be the final temperature of the sword and the oil?

b$)$ Thinking about the heat capacity of water versus oil and the equation you just used, would

you expect oil or water to be the fastest at reduced the temperature of the blade? Why do

you think oil is used over water in regards to this? Remember to include all assumptions, block diagrams, full working, and units.