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Author Question: In grinding a steel knife blade (specific heat = 0.11 cal/g-C), the metal can get as hot as 400.C. ... (Read 19 times)

mckennatimberlake

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on: Jul 27, 2018
In grinding a steel knife blade (specific heat = 0.11 cal/g-C), the metal can get as hot as 400.C. If the blade has a mass of 80. g,
 
  what is the minimum amount of water needed at 20C if the water is not to rise above the boiling point when the hot blade is quenched in it?

Question 2

What is the area of a circle of radius 1.119 m?
 
  A) 3.934 m2
  B) 3.93 m2
  C) 3.9338 m2
  D) 3.93378 m2
  E) 3.937 m2


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macmac

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Reply #1 on: Jul 27, 2018
Answer to Question 1

33 grams

Answer to Question 2

A


mckennatimberlake

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


macmac

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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