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Author Question: A team of people who traveled to the North Pole by dogsled lived on butter because they needed to ... (Read 48 times)

Charlie

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on: Aug 6, 2020

Question 1

A super-insulated house is at a temperature of 20°C. The temperature outside is 0°C. The surface area of the house is 200 m2, and the emissivity is 1. Approximately how much energy is radiated (in W) per second?

◦
20 000

◦
2 000

◦
200

◦
2

◦
0.2


Question 2

A team of people who traveled to the North Pole by dogsled lived on butter because they needed to consume 6 000 dietician's Calories each day. Because the ice there is lumpy and irregular, they had to help the dogs by pushing and lifting the load. Assume they had a 16 hour working day and that each person could lift a 500 N load. How many times would a person have to lift this weight 1.00 m upwards in a constant gravitational field where to do the work equivalent to 6 000 Calories?

◦
50.2

◦
492

◦
5 130

◦
50 200

◦
492 000
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
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Marked as best answer by Charlie on Aug 6, 2020

upturnedfurball

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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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Charlie

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Reply 2 on: Aug 6, 2020
Excellent

olderstudent

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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