In a physics laboratory experiment to determine the thermal properties of lead, a sealed tube of length 1.5 m containing a mass of lead shot is inverted 60 times. Each time the tube is inverted, the lead shot falls the full length of the tube. Assume that all of the gravitational potential energy lost by the falling lead shot is converted entirely into its own thermal energy, with no heat transfer to the tube or the surroundings.
The specific heat capacity of lead is 130 J kg-1 K-1 and the acceleration due to gravity is g=9.81 m s−2g = 9.81\text{ m s}^{-2}g=9.81 m s−2.
What is the temperature increase of the lead shot?
0.11 K0.11\text{ K}0.11 K
0.21 K0.21\text{ K}0.21 K
6.8 K6.8\text{ K}6.8 K
1.1 K1.1\text{ K}1.1 K
