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Author Question: A camper carries her drinks in an ice chest made of styrofoam. The chest is 40 cm 45 cm 70 cm, and ... (Read 25 times)

formula1

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on: Jul 29, 2018
A camper carries her drinks in an ice chest made of styrofoam. The chest is 40 cm  45 cm  70 cm, and the walls and lid are 2.5 cm thick.
 
  The contents of the chest are ice, water, cans of soft drinks, and other food, all of which are in thermal equilibrium with the ice water. The temperature just outside the ice chest is 35C. What is the rate of heat flow through the walls of the box? The thermal conductivity of styrofoam is 0.010 W/(mK). A) 14 W
  B) 16 W
  C) 18 W
  D) 20 W
  E) 22 W

Question 2

The more we know about a particle's position, the less we know about its
 
  A) speed.
  B) momentum.
  C) kinetic energy.
  D) all of the above
  E) none of the above


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asdfghjkl;

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Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

Answer: D


formula1

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Reply #2 on: Jul 29, 2018
Thanks


asdfghjkl;

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Reply #3 on: Jul 29, 2018
Welcome :)


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