An insulated container is filled with ice at 0 ∘ C, and another container is filled with water that is continuously boiling at 10 0 ∘ C. In a series of experiments, the container connected by various

Question

An insulated container is filled with ice at $0^{\circ}$ C, and another container is filled with water that is continuously boiling at $10 0^{\circ}$ C. In a series of experiments, the container connected by various thick metal rods that pass through the walls of the container as shown in Figure 4.46. Experiment I: a copper rod is used and all ice melts in 20 minutes. Experiment II: a steel rod of identical dimensions is used and all ice melts in 80 minutes. Experiment III: both rods are used in series and all ice melts in $t_{10}$ minutes. Experiment IV: both rods are used in parallel and all ice melts in $t_{20}$ minutes. Choose the correct statements:

TestHub · Accepted Answer

The melting time is proportional to the thermal resistance. In series: 20 + 80 = 100 minutes. In parallel: t 1 ​ = 20 1 ​ + 80 1 ​ = 80 5 ​ , so t = 16 minutes. A and C.

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