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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 red blood cells to settle through the less dense blood serum and collect at the bottom of the container. Suppose the centripetal acceleration of the sample is 5.37 x 103 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 6.45 cm from the axis of rotation?
A parallel-plate capacitor has a capacitance of 10mF and is charged with a 20-V power supply. What is the voltage now across the capacitor
A car of mass 1050 kg is going around an unbanked curve of radius 20 m. what is the normal force of the road on the car
There is a clever kitchen gadget for drying lettuce leaves afteryou wash them. It consists of a cylindrical container mounted sothat it can be rotated about its axis by turning a hand crank.
the elevator begins to accelerate at 1.5m/s^2. What is his apparent weight
A railroad car of mass 2.70 multiplied by 104 kg moving at 4.00 m/s collides and couples with two coupledrailroad cars, each of the same mass as the single car and movingin the same direction at 1.20 m/s.
A meterstick is initially balanced on a fulcrum at its midpoint. You have four identical masses. Where should the fourth mass be placed in order to balance the meterstick
A piece of dynamite is used to break apart a huge 30000 kg boulder (approximately 5 m3 sphere) that rolled into a nice suburban middle-class couple's living room about a decade ago in Spring Valley. What are the momenta of these three chunks
question gloria had a rectangular garden plot last year with an with an area of 60 square feet. this year glorias
The United States uses 1.12×1019J of electrical energy per year. How many kilograms of uranium would have to be mined per year to provide that much 235U
An elevator can lift a 185 N aircraft a distance of 36 meters in 11 s. What is the power output of the elevator
A 3.0 kg particle with velocity v = (5.0 m/s) - (6.0 m/s) is at x = 3.0 m, y = 8.0 m. It is pulled by a 7.0 N force in the negative x direction. What torque about the origin acts on the particle
A 35 microfarad capacitor is in series with a 250 ohm resistor and10V battery. Initally a switch in the circuit is open and the capcitor is uncharged. What is the current in the circuit immediately after the switchis closed?
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