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A centrifuge is a device in which a small container ofmaterial is rotated at a high speed on a circular path. Sucha device is used in medical laboratories, for instance, to causemore dense red blood cells to settle through the less dense bloodserum and collect at the bottom of the contatiner. Supposethe centripetal acceleration of the sample is 6.25 *103times larger than the acceleration due to gravity. How many revolutions per minute is the sample making, if it is locatedat a radius of 5.00cm from the axis of rotation?
Elm Street has a pronounced dip at the bottom of a steep hill before going back uphill on the other side. Sitting on the scale while the car is parked gives a reading of 588 N. Analyze your data, using a graph, to determine the dip's radius of curv..
What is the final velocity of a hoop that rolls without slipping down a 7.50 m high hill, starting from rest
How to generate a constant deceleration
A spring has a force constant of 323 N/m and an unstretched length of 6 cm. One end is attached to a post that is free to rotate in the center of a smooth table, as shown in the top view below. The other end is attached to a 4-kg disk moving in un..
a highway is to be built between two towns one of which lies 87.0 km south and 50.0 km west of the other. a what is the
A 5.00-kg partridge is suspended from a pear tree by an ideal spring of negligible mass. How much does the spring shorten
A slingshot fires a pebble that is in the air for 5.30seconds. It lands 73.0m away from where it was initially shot. Determine the initial horizontal and vertical components of the velocity
In order to determine the mass of a molecule, first an electron is removed from the molecule. The resulting ion is accelerated from rest by an electric potential difference 2.7 104 V, Find the mass of the ion
A loudspeaker of mass 24.0 {rm kg} is suspended a distance of h = 1.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.70 {rm m}.
A startled armadillo leaps upward rising 0.544 m in the first 0.202 s. What is its initial speed as it leaves the ground?
A parallel plate capacitor has a potential difference between the plates of 80 V. what is the electrical energy stored by this capacitor
Assume a planet is a uniform sphere of radius R that (somehow) has a narrow radial tunnel through its center. Also assume we can position an apple anywhere along the tunnel or outside the sphere. Let FR be the magnitude of the gravitational force ..
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