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The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
Question
C
11
I
Question
Carly places one end of a steel bar in a Bunsen flame and the other end in an ice cube. By what factor is the rate of heat flow changed when the bar's cross-sectional area is doubled?
Answer
2

Notes
User Added Note e d
KillGorack 2023-07-08 18:00:22 The rate of heat flow (Q/t) through a material is given by the equation: Q/t = kA(T1 - T2)/L where: Q/t is the heat flow per unit time, k is the thermal conductivity of the material, A is the cross-sectional area, (T1 - T2) is the temperature difference between the two ends, L is the length of the material. From this equation, it's clear that the rate of heat flow is directly proportional to the cross-sectional area. This means if you double the cross-sectional area (A), you would also double the rate of heat flow. So, the rate of heat flow changes by a factor of 2 when the bar's cross-sectional area is doubled.
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