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Author Question: If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in ... (Read 245 times)

haleyc112

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on: Jul 28, 2018
If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in front of the mirror, the required length of the mirror:
 a. depends on both the height of the man and the distance from the man to the mirror.
  b. is equal to the height of the man.
  c. is equal to one-half the height of the man.
  d. depends on the distance the man stands from the mirror.

Question 2

A machine gear consists of 0.40 kg of iron and 0.16 kg of copper. How much total heat is generated in the part if its temperature increases by 35C? (Specific heats of iron and copper are 450 and 390 J/kg  C, respectively.)
 a. 910 J
  c. 4000 J
  b. 8500 J
  d. 5300 J


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diesoon

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

C

Answer to Question 2

B


haleyc112

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Reply #2 on: Jul 28, 2018
Thank you!


diesoon

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Reply #3 on: Jul 28, 2018
Always glad to help...


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