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Author Question: If a virtual image is formed 8.00 cm along the principal axis from a convex mirror of focal length ... (Read 51 times)

ereecah

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on: Jul 28, 2018
If a virtual image is formed 8.00 cm along the principal axis from a convex mirror of focal length 15.0 cm, how far is the object from the mirror?
 a. 30.0 cm
  c. 3.00 cm
  b. 6.00 cm
  d. 17.1 cm

Question 2

Two stars, A and B, have the same emissivity, but the radii and surface temperatures are different with RA = 2 RB, and TA = 0.5 TB. Assuming the temperature of space to be negligible, which star radiates the most energy per unit time?
 a. Star A
  b. Star B
  c. Both radiate the same amount of energy per unit time.
  d. More information is needed in order to make a determination.


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ashely1112

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

D

Answer to Question 2

B


ereecah

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Reply 2 on: Jul 28, 2018
Gracias!

cassie_ragen

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Reply 3 on: Yesterday
Wow, this really help

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