High‑speed ultracentrifuges are useful devices to sediment materials quickly or to separate materials. an ultracentrifuge spins a small tube in a circle of radius 13.1 cm at 5.0 rev/min. what is the centripetal force experienced by a sample that has a mass of 0.00310 kg?

Fc = 7.14N

Explanation:

First of all, let's convert everything to the same unit system:

m = 0.0031kg     R = 13.1cm * 1m / 100cm = 0.131m      

ω = 50000 rev/min * 1rev /( 2π rad ) * 1min / 60s = 132.63 rad/s

Now we can calculate centripetal force as:

Replacing the values we get the

Fc = 7.14N

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

im guessing the west of station b