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Author Question: Stars A and B have the same temperature, but star A has twice the radius of star B. What is the ... (Read 129 times)

K@

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on: Jul 28, 2018
Stars A and B have the same temperature, but star A has twice the radius of star B. What is the ratio of star As power output to star Bs output due to electromagnetic radiation? The emissivity of both stars can be assumed to be 1.
  1.4
  2.8
  3.16
  4.64

Question 2

Two rods of the same length and diameter are made from different materials. The rods are to connect two regions of different temperature so that energy will transfer through the rods by heat. They can be connected in series, as in figure a, or in parallel, as in figure b. In which case is the rate of energy transfer by heat larger?
 


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cici

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Reply #1 on: Jul 28, 2018
Answer to Question 1

1

Answer to Question 2

2


K@

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Reply 2 on: Jul 28, 2018
Gracias!

bigcheese9

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Reply 3 on: Yesterday
Excellent

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