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Author Question: Since the rate of heat transfer by conduction is proportional to the T, what percent savings in your ... (Read 75 times)

K@

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on: Jul 28, 2018
Since the rate of heat transfer by conduction is proportional to the T, what percent savings in your heating bill would you expect if you turned the thermostat down from 75 to 65F, and the outside temperature is 25F?
 a. 10 b. 20 c. 30 d. 40 e. 50

Question 2

An artillery shell is fired with an initial velocity of 300 m/s at 55.0 above the horizontal. It explodes on a mountainside 42.0 s after firing. If x is horizontal and y vertical, find the (x, y) coordinates where the shell explodes.


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huda

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

b

Answer to Question 2

7.22 km, 1.68 km


K@

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


huda

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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