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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 redblood cells to settle through the less dense blood serum and collect at the bottom of the container. Suppose the centripet alacceleration of the sample is 5.15 103 times as large asthe acceleration due to gravity. How many revolutions per minute isthe sample making, if it is located at a radiusof 4.05 cm from the axis of rotation?
A merry-go-round starts from rest and accelerates uniformly over 16.5 s to a final angular velocity of 7.65 rev/min. Find the person's tangential acceleration
question two large parallel plates are separated by 0.90cm and carry uniform charge densities equal in magnitude and
A spring has a force constant of 931N/m and an unstretched length of 8 cm. One end is attached to a post that is free to rotate in the center of a smooth table.
Two blocks with masses, 2.5kg and 3.5kg, rest on a frictionless surface and are connected by a light string, What is the magnitude of the force in the string
A centrifuge is rotating at 10,000 revolutions/minute. It is brought to rest in 4.00 seconds under a constant acceleration. Determine the initial angular velocity of the centrifuge in rad/sec
Calculate the force a mother must exert to hold her 12.0 kg child in an elevator accelerates upward at 0.850 m/s2
Suppose V max = 120 V for an alternating current power source. What is the rms voltage for the source
A man with mass m1 = 61.0 kg stands at the left end of a uniform boat with mass m2 = 169.0 kg and a length L = 2.7 m. At what location does the man end up
Assuming a constant pressure gradient, if blood flow is reduced by 52%, by what factor is a blood vessel decreased in radius
the positronium atom consists of an electron positron pair bound by their Coluomb potential, if the view the particales as moving in a classical circular orbit what is the radius of the orbit
What is an average speed of this train
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 13.1 kg and 2.08 × 10-3 m3, Find the mass of the gold in the rock
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