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1. Centrifuges are commonly used in biological laboratories for the isolation and maintenance of cell preparations. For cell separation, assume centrifugation conditions that are 1.00 x 103 rpm using an 8.31-cm-radius rotor. What is the radial acceleration of material in the centrifuge under these conditions? Express your answer as a multiple of g. Do not enter unit.
2. At 1.00 x 103 rpm (and with a 8.31-cm rotor) what is the net force on a red blood cell whose mass is 9.12 x 10-14 kg?
3. What is the net force on a virus particle of mass 4.95 x 10-21 kg under the same conditions?
4. To pellet out virus particles and even to separate large molecules such as proteins, super-high-speed centrifuges called ultracentrifuges are used in which the rotor spins in a vacuum to reduce heating due to friction. What is the radial acceleration inside an ultracentrifuge at 75500 rpm with an 8.31-cm rotor? Express your answer as a multiple of g. Do not enter unit.
An explosion breaks an object into two pieces, one of which has 2.40 times the mass of the other. If 7100 J were released in the explosion, how much kinetic energy did each piece obtain?
A cannon shoots a ball with initial speed 10 m/s at an angle of 30 degrees. How far from the cannon does the ball hit the ground
A 15000-kg vehicle travels at a constant speed of 22 m/s around a circular track that has a radius of 85 m.Determine the magnitude of the net force that acts on the vehicle
A 52.5 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 1.08 x 10-7 ohm*m and the density is 7.79g/cm3. What will be the diameter of the wire
question1imagine drawing two equipotentials in plane of the figure one passing through point a and one passing through
A block of mass 0.489 kg is placed on the end of a spring which has a stiffness of 337 N/m. What is the frequency of oscillation
A skier of mass 85.0 kilogram is pulled up a snow-covered slope at a constant speed by a tow rope that is parallel to the ground. Find what is the tension of the tow rope
A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to10 rad/s over the next 4.0 seconds. Suppose that the angular acceleration is constant. What is the average angular speed of t..
In a closed piston-cylinder device, an isothermal expansion of anideal gas from 1.5 m3 to 4.7m3 occurs at a temperature of 99oC. How much heat is need to complete the process
A tungsten wire has a radius of 0.070 mm and is heated from 20.0 to 1416 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1, How long is the wire
An astronaut is orbiting a black hole with a mass of2.0x1031 kg at a distance of 126km from its center. What is the net tidal force pulling his cheeks apart
A spring with an unstrained length of 0.074 m and a spring constant of 2.4 N/m hangs vertically downward from the ceiling, What is the magnitude of the external electric field
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