BIO Ultracentrifuge You are working in a biology lab and learning to use a new ultracentrifuge for blood tests. The specifications for the centrifuge say that a red blood cell rotating in the ultracentrifuge moves at 470 m/s and has a radial acceleration of 150,000 g’s (that is, 150,000 times 9 .8 m/s 2 ). The radius of the centrifuge is 0.15 m. You wonder if this claim is correct. Support your answer with a calculation.
BIO Ultracentrifuge You are working in a biology lab and learning to use a new ultracentrifuge for blood tests. The specifications for the centrifuge say that a red blood cell rotating in the ultracentrifuge moves at 470 m/s and has a radial acceleration of 150,000 g’s (that is, 150,000 times 9 .8 m/s 2 ). The radius of the centrifuge is 0.15 m. You wonder if this claim is correct. Support your answer with a calculation.
BIO Ultracentrifuge You are working in a biology lab and learning to use a new ultracentrifuge for blood tests. The specifications for the centrifuge say that a red blood cell rotating in the ultracentrifuge moves at 470 m/s and has a radial acceleration of 150,000 g’s (that is, 150,000 times
9
.8 m/s
2
). The radius of the centrifuge is 0.15 m. You wonder if this claim is correct. Support your answer with a calculation.
Chapter 5 Problem 8: BIO Ultracentrifuge You are working in a biology lab and learning to use a new ultracentrifuge for blood tests. The specifications for the centrifuge say that a red blood cell rotating in the ultracentrifuge moves at and has a radial acceleration of 150,000 g’s (that is, 150,000 times ). The radius of the centrifuge is 0.15 m. You wonder if this claim is correct. Support your answer with a calculation.
In a medical lab, you put blood in tubes in a centrifuge to separate the plasma from the formed elements (platelets, red blood cells, and white blood cells). The centrifuge you have goes from rest to 20,000 rpm in 4.0 s.
What is the final angular velocity of the centrifuge?
What is the angular acceleration of the centrifuge?
How many rotations does the centrifuge go through while it accelerates?
An ultracentrifuge accelerates uniformly from rest to 100,000 rpm in 2.0 min. If this ultracentrifuge accelerates 2.0 seconds starting from rest, what is the magnitude of the centripetal acceleration in unit of gravitational acceleration g for your sample sitting at 6.0 cm from the center axis? Use g = 9.8 m/s2. Hint: compute the centripetal acceleration in unit of m/s2 first, then divided by g will be your answer. For example, if your centripetal acceleration is 19.6 m/s2, your answer measured in unit of g is 2.0.
Chapter 5 Solutions
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