# 1. A solid sphere made of polished copper has a diameter of 2 cm and is at 100 C. We now expose the.

1. A solid sphere made of polished copper has a diameter of
2 cm and is at 100 C. We now expose the solid sphere to are at 50 C and 1 atm.
Use the lumped capacitance method to plot the temperature of the solid sphere
versus time after five minutes of exposure. The air is quiescent.

2. A spent fuel rod is placed in a canister. A vacuum pump
is used to remove all air and establish vacuum in the canister. The surface
temperature of the rod must not exceed 302 F (150 C) when the temperature of
the ambient is at 40 C (104 F). Find the canister wall temperature. Ignore
conduction heat transfer
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1. A solid sphere made of polished copper has a diameter of
2 cm and is at 100 C. We now expose the solid sphere to are at 50 C and 1 atm.
Use the lumped capacitance method to plot the temperature of the solid sphere
versus time after five minutes of exposure. The air is quiescent.

2. A spent fuel rod is placed in a canister. A vacuum pump
is used to remove all air and establish vacuum in the canister. The surface
temperature of the rod must not exceed 302 F (150 C) when the temperature of
the ambient is at 40 C (104 F). Find the canister wall temperature. Ignore
conduction heat transfer between the rod and the canister. _ = 0.6.

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