physics
posted by marie .
A centrifuge is a common laboratory instrument that separates components of differing densities in solution. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical laboratory is turned off, it continues to rotate with a constant angular deceleration for 11.6 s before coming to rest.
(a) If its initial angular speed was 4110 rpm, what is the magnitude of its angular deceleration?

Convert 4110 rpm to radians per second, and divide the result by 11.6 s.
The dimensions of the angular acceleration will be radians/sec^2 
thank you, I initially thought of doing that but it was the wrong answer. Thank you though!

Did you get 430 rad/s for the initial angular velocity?
That actually sounds low for a modern centrifuge.
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