An ultracentrifuge spins biological samples at very high speeds in order to separate their constituent microscopic components. one such instrument spins at 120,000 rpm, and the samples experience a centripetal acceleration of 6.6×10^6 m/s^2. what is the radius of the circle around which the samples travel?

4.2 cm

Explanation:

f = 120,000 rpm = 120,000 / 60 = 2000 rps

a = 6.6 x 10^6 m/s^2

a = rw^2

6.6 x 10^6 = r x (2 x 3.14 x 2000)^2

r = 0.042 m = 4.2 cm

are their multiple choices ?

explanation:

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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