Question (Category: physics)
in a certain experiment, a small radioactive source must move at selected, extremely slow speeds. this 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 way. the coefficient of linear expansion of aluminum is aal = 23 cross 10-6c176.if the effective heated section of the rod in the figure below has length d = 3.50 cm, at what constant rate must the temperature of the rod be changed if the source is to move at
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