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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 utilized in medical laboratories, for instance, to cause the more dense red blood cells to settle during the less dense blood serum and collect at the bottom of the container. Assume the centripetal acceleration of the sample is 4.72x103 times as large as the acceleration due to gravity. How many revolutions per minute is the sample making, if it is located at a radius of 7.95 cm from the axis of rotation?
When two identical ions are separated by a distance of 5.8 10-10 m, How many electrons are missing from each ion
A power supply maintains a potential difference of 79.1 V across a 1.69 KQ resistor. What is the current in the resistor in millamperes
predict how to changing the variables may effect the distance traveled or the speed of the race car.
A 1.55--tall fisherman stands at the edge of a lake, being watched by a suspicious trout who is 3.50 from the fisherman in the horizontal direction, At what angle from the vertical does the fish see the top of the fisherman's head
A small electric car overcomes a 260N friction force when traveling 23km/h. What percent of the input power is used to drive the car
Motor M draws in the cable with an acceleration of 4 ft/s^2, measured relative to the 200 lb mine car. Determine the acceleration of the car and the tension in the cable. avoid the mass of the pulleys.
If a simple pendulum with length 1.5m makes 72 oscillations in 180 s, what is the acceleration of gravity at its location
A ball is launched straight up with a speed of 25.27 miles per hour. What is the maximum height reached in meters
a 10 kg block is pushed against a vertical wall by a horizontal force of 100n . the coefficient of static friction is
At a point where an irrigation canal having a rectangular cross section is 18.3m wide and 3.70m deep, the water flows at 2.25cm/s. How deep is the canal at this point
grinding wheel is initially at rest. A constant external torque of 47.2 N· m is applied to the wheel for 18.8 s, Find the moment of inertia of the wheel
A small object oscillates back and forth at the bottom of a frictionless hemipherical bowl. The radius of the bowl is R, and the angle theta is small enough that the object oscillate in simple harmonic motion.
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