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Author Question: Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house ... (Read 53 times)

jilianpiloj

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on: Aug 6, 2020

Question 1

An 8 000-kg aluminum flagpole 100-m long is heated by the sun from a temperature of 10°C to 20°C. Find the heat transferred (in J) to the aluminum if the specific heat of aluminum is 0.215 cal/g⋅°C.

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7.2 × 105

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7.2 × 107

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7.2 × 103

◦
7.2 × 101

◦
7.2 × 102


Question 2

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. Sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. Which one, if either is correct?

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Beryl, because low thermal conductivity results in low heat transfer.

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Beryl, because low thermal conductivity results in high heat transfer.

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Sapphire, because low thermal conductivity results in low heat transfer.

◦
Sapphire, because low thermal conductivity results in high heat transfer.

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Neither, because low heat transfer is desirable both in summer and in winter.
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
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Marked as best answer by jilianpiloj on Aug 6, 2020

succesfull

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Reply #1 on: Aug 6, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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jilianpiloj

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Reply 2 on: Aug 6, 2020
YES! Correct, THANKS for helping me on my review

scottmt

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Reply 3 on: Yesterday
:D TYSM

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