Two metal blocks of equal mass are placed next to each other in an insulated chamber. One

block is copper $(Cu,c=0\mathrm{.}39\frac{J}{g}C),$ with an initial temperature of $10.C.$ The other is lead

$=0\mathrm{.}13\frac{J}{g}C),$ initially at $50.C.$ Which graph below, $A-C,$ best represents how the temperatures

of the blocks would change over time?

A

B

$C$

No way to predict without more information