Laboratory Instruments

A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum and collect at the bottom of the [...]

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Which of the following correctly lists the order in which cellular components will be found in the pellet when homogenized cells are treated with increasingly rapid spins in a centrifuge? A) ribosomes, nucleus, mitochondria B) chloroplasts, ribosomes, vacuoles C) nucleus, ribosomes, chloroplasts D) vacuoles, ribosomes, nucleus E) nucleus, mitochondria, ribosomes Thanks! ^^

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How fast (in rpm) must a centrifuge rotate if a particle 6.00 cm from the axis of rotation is to experience an acceleration of 75,000 g’s?

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A test tube in a centrifuge is pivoted so that it swings out horizontally as the machine builds up speed. If the bottom of the tube is 125.0 mm from the central spin axis, and if the machine hits 50500 rev/min, what would be the centripetal force exerted on a giant amoeba of mass 8.00E-9 [...]

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To withstand “g-forces” of up to 10g’s, caused by suddenly pulling out of a steep dive, fighter jet pilots train on a “human centrifuge.” 10g’s is an acceleration of 98m/s^2. If the length of the centrifuge arm is 12m, at what speed is the rider moving when she experiences 10g’s?

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A centrifuge in a medical laboratory rotates at an angular speed of 3650 rev/min. When switched off, it rotates through 48.0 revolutions before coming to rest. Find the constant angular acceleration of the centrifuge.

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A typical laboratory centrifuge rotates at 4000 rpm. Test tubes have to be placed into a centrifuge very carefully because of the very large accelerations. What is the magnitude of the acceleration a test tube would experience if dropped from a height of 1.0 m and stopped in a 1.0-ms-long encounter with a hard floor?

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You are designing a centrifuge to spin at a rate of 16,280 rev/min.? Calculate the maximum centripetal acceleration that a test-tube sample held in the centrifuge arm 14.9 cm from the rotation axis must withstand. how do you solve this? thanks so much!

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How fast (in rpm) must a centrifuge rotate if a particle 5.0 cm from the axis of rotation is to experience an acceleration of 120,000 g’s?

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