A Metal Bar Is Used to Conduct Heat

question 88

Multiple Choice

A metal bar is used to conduct heat.When the temperature at one end is 88.0°C and at the other is 15.0°C,heat is transferred at a rate of 19.0 J/s.The bar is then stretched uniformly to twice its original length.If again it has ends at 88.0°C and 15.0°C,at what rate will heat be transferred between it ends?

• A)4.75 J/s
• B)9.50 J/s
• C)19.0 J/s
• D)38.0 J/s
• E)76.0 J/s

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