In a certain experiment, a small radioactive source must move at selected, extremely slow speedsThis motion is accomplished by fastening the source to one end of an aluminum rod and heating the central section of the rod in a controlled wayIf the effective heated section of the rod has length d 2.00 cm, at what constant rate must the temperature of the rod be changed if the source is to move at a constant speed of 100 nm/s?The answer is 0.217 K/s but I don't know how to get this answer
