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Life scientists use ultracentrifuges to separate biological components or to remove molecules from suspension. Samples in a symmetric array of containers are spun rapidly about a central axis. The centrifugal acceleration they experience in their moving reference frame acts as "artificial gravity" to effect a rapid separation. If the sample containers are 14.7 cm from the rotation axis,
what rotation frequency is required to produce an acceleration of 1.09·105 g?
While running home from second base a 67 kg runner rounds third base at a speed of 3.1 m/s, What is the centripetal force of this turn on third base
The end of the spring is next to the 20- mark on the ruler.If a 3.0- mass is now attached to the end of the spring, where will end of the spring line up with the ruler marks?
A body travels a distance of 3km towards east and 4 km towards north and finally 9 km towards east. what is the total distance travelled and displacement of body.
A 418 Hz sound wave travels through a substance. The wavelength of the sound wave is measured to be 1.7 meters
You place an object with an electrical charge of +0.256 C at a point in space, What is the magnitude and direction of the electric field at that point in space
A 1.5 kg particle-like object moves in a plane with velocity components vx = 40 m/s and vy = 90 m/s as it passes through the point with (x, y) coordinates of (3.0, -4.0) m.
Ultraviolet light is incident normally on the surface of a certain substance. The binding energy of the electrons in this substance is 3.44 eV. The incident light has an intensity of 0.063 W/m2
A turntable with a moment of inertia of 4.8 kg · m2 rotates freely with an angular speed of 33 1/3 rpm. Calculate the angular speed of the turntable
q1. a gadget of mass 17.52kg floats in space without motion. because of some internal malfunction the gadget violently
A coil with 41 turns of wire is wrapped on a frame with a square cross-section 1.85 cm on a side. Find the magnitude of the induced current in the coil while the field is changing
q1. a helicopter is ascending vertically with a speed of 5.57. at a height of 124 above the earth package is dropped
a 1.000 meter long rod (measured when stationary) is moving at 0.8 c. How long would the rod appear to a stationary observer
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