Welding Rod 2
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Heat conduction between 2 identical metal rods?
Two identical metal rods are welded together at each end and conduct 10J in 2 mins. How long would it take to conduct 10J if the rods were welded one on top of the other?
It is similar to resistors in parallel and in series. In series you halve the conduction rate, in series you double it, so on top of one another you have four time the conduction you have with them end to end. So the answer is 30 seconds.
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