题目
题目

UCIC 202503 PHYS101 Quiz 6

单项选择题

Which of the following will result in the smallest rate of heat transfer?

选项
A.a. The largest value of thermal conductivity
B.b. The largest cross sectional area of the object
C.c. The largest temperature difference between regions
D.d. The largest distance that the heat travels
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标准答案
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思路分析
Consider the factors that influence the rate of heat transfer according to Fourier's law, Q = k A ΔT / L, where a larger temperature difference, larger area, or higher conductivity all tend to increase the rate, while a longer distance (thickness) reduces......Login to view full explanation

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Question text1. The one-dimensional heat flow equation is: [math: ρCP∂T∂t=κ∂2T∂z2+A] where ρ, Cp, and κ are the density, specific heat and thermal conductivity, and A represents heat sinks and sources. The boundary conditions in a given system are: (i) T=320 K at z=0 (ii) T=1200 K at z=40 km and we also have [math: κ=3Wm−1K−1]. Assuming no internal heat sources, calculate a) The thermal gradient of the equilibrium geotherm in [math: K/km] to two significant figures.Thermal gradient = Answer 1 Question 3[input] [math: K/km] [6] b) The temperature at a depth of 100km as predicted by this geotherm model. Give answer in K to two significant figures. T(z=100 km) = Answer 2 Question 3[input] K [4]

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What is the formula to calculate the rate of heat transfer in conduction?

The process whereby heat flows by means of molecular collisions is referred to as  

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