Berkeley Review Physics Problem

[NigerianBull87]

For those that have the book it is in Section II page 84 2.7b

The question asks: How long does it take for a 33-rpm record to rotate once, at constant speed?

I assume rpm (rev/min)
The answer is B? How, I though that it would be C. Wouldn't that do more than 33 rpm at that rate.

A. 0.033
B. 0.29
C. 2.66
D. 3.33

(all in seconds)

I would appreciate the help.

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[sunsfan]

In my book, for the same problem, the choices are:

A. 0.033 s
B 1.8 s
C 2.66 s
D 3.33 s

B is the correct answer.

 

[NigerianBull87]

In my book, for the same problem, the choices are:

A. 0.033 s
B 1.8 s
C 2.66 s
D 3.33 s

B is the correct answer.

that is what my guess would have been? I think maybe because my version is from 2002 or something is the reason why. I got an outdated version.

 

[4563728]

For section 5, passage 6 number 39, I don't really understand why the graph is a straight line. If we are graphing the relationship between v^2 vs. wavelength, shouldn't it be a square root graph (specifically, option B)? I really need help with this problem I am really not understanding it!