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**[SOLVED] Ultracentrifuge Problem**

Find the required angular speed (in rpm) of an ultracentrifuge for the radial acceleration of a point .0250 m from the axis to equal 400000g. g=9.8 m/s^2.

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Find the required angular speed (in rpm) of an ultracentrifuge for the radial acceleration of a point .0250 m from the axis to equal 400000g. g=9.8 m/s^2.

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Oh sorry I put this in the wrong subforum.

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berkeman

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berkeman

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That sounds like a good approach.

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Hootenanny

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Your on the right track, but the question wants the angular speed in

Edit: Sorry berkeman, didn't see you there.

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berkeman

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If you have an answer in revolutions per second, should you divide or multiply to get an answer in RPM?

BTW, it would be best if you carried units along with your calculations for each quantity, and make sure that units are cancelling out with each operation. At each step in manipulating equations, the units on the left side of the + sign must match the units on the RHS. And each additive quantity on the LHS and RHS must have the same units.

Carrying units along with the quantities makes it easy to know whether to divide or multiply by 60. Quiz Question -- why?

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Ah... dumb me... should've multiplied not divided by 60 -.-' Thank you again...

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berkeman

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Good job. Get in the habit of carrying units along in your equations, and you will be amazed at how much that helps you keep things straight. One of the best tricks I learned in my first year of Undergrad.Ah... dumb me... should've multiplied not divided by 60 -.-' Thank you again...