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The ultracentrifuge is an important tool for separating and analyzing proteins. Because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. Any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. Suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. If the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? (Please be thorough on your answer)
If a photon is a wave and is moving (along the X-axis) at the speed of light, isn't any specific part of the wave moving faster than the speed of light? A specific point on the wave moves up and down yet is traveling in the X direction at the speed o..
A spool of thin wire rotates without friction about its axis. A man pulls down on a wire connected to an inner radius with force of 16.10 N. How long does it take to enlarge the angular velocity of the spool from 11.00 rad/s to 39.00 rad/s? Icm = ..
Two sinusoidal waves of the same period, with amplitudes of 5.0 and 6.5 mm, travel in the same direction along a stretched string; they produce a resultant wave with an amplitude of 10.036 mm. The phase constant of the 5.0 mm wave is 0. What is th..
You toss a conductive open ring of diameter d = 2.65 cm up in the air. The ring is flipping around a horizontal axis at a rate of 7.25 flips per second. What is the maximum emf induced in the ring
The angular position of a point on the rim of a rotating wheel is given by ? = 7.68t - 5.13t2 + 1.73t3, where ? is in radians and t is in seconds. find the angular velocities at the end of this time interval
A 1.5 {rm kg} block rests on top of a 7.5 {rm kg} block. The cord and pulley have negligible mass, and there is no significant friction anywhere. What force F should be applied to bottom block so the top block accelerates to the right at 2.60 m/s^..
Illustrate at what horizontal distance, x, from the base of the building will the rock strike the ground? Assume the ground is level and that the side of the building is vertical. The acceleration of gravity is 9.8 m/s2 .
A 137-cm-long wire is made by welding a 1.3-mm-diameter, 26-cm-long copper wire to a 0.31-mm-diameter, What is the resistance of the composite wire
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, where A is a constant. (Use the following as necessary: 0, A, r, and R, as necessary.)
A father racing his son has 2/3 the kinetic energy of the son who has 2/3 the mass of the father. What is the origianal speed of the father
Three equal charges of magnitude +4.00 uC are placed at the corners of an equilateral triangle of side 2 cm. what is the electric potential energy of the system
What will the resultant force
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