A laboratory ultracentrifuge is designed to produce a centripetal acceleration of 4.0 106 g at a distance of 5.00 cm from the axis. What angular velocity in rev/min is required?

Answer 1

Require R*w^2 = 4*10^6 g
Then solve for w, which will be in radians per second.
Then convert w to rpm.
Use an ^ before your exponents

R = 0.05 m
g = 9.8 m/s^2

Answer 2

Thank you drwls...
I got 2.7e6 but apparently that is incorrect.