Aperson with no experience in fluid mechanics wants to estimate the friction factor for 1-in.-diameter galvanized iron pipe at a reynolds number of 12000. the person stumble across the simple equation of f = 64/re and use this to calculate the friction factor. consider the problem with this approach and estimate percentage of their error (fa-f)/fa, where fa – actual friction factor.

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

explanation:

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answer:

1.3 + 20

explanation:

20.1.3

answer:

the correct answer is d