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a tiny .5 kg object moves on a frictionlesshorizontal table in a circular path of radius 1.0 m the angular speed is 6.28 rad/s the object is attached to a string ofnegligible mass that passes through a small hole in the table atthe center of the circle. Someone under the table begins topull the string downward to make the circle smaller. If the stringwill tolerate a tension of no more than 105 N, what is the radius of the smallest possible circle on which the object can move?
A bucket of mass m is tied to a massless cable that is wrapped around the outer rim of a frictionless uniform pulley of radius R. what must be the moment of inertia of the pulley
When a high-power laser is used in the Earth's atmosphere, the electric field associated with the laser beam can ionize the air, turning it into a conducting plasma that reflects the laser light.
A butterfly flies from the top of a tree in the center of a garden to rest on top of a flower at the garden's edge. Determine the magnitude of the butterfly's displacement
Automobile engine slows down from 4500 rpm to 1200 rpm in 2.5 s. compute (a) its angular acceleration, assumed constant and (b) total number of revolutions the engine makes in this time.
Two long, straight wires cross each other at right angles, and each carries same current. Which of the following statements are true regarding the total magnetic field at the various points due to the two wires.
Suppose 79kW is to be transmitted over two 0.105ohms lines. Estimate how much power is saved if the voltage is stepped up from 200V to 2000V and then down again, Estimate how much power is saved
The potential energy U(r) between any two atoms, when given as a function of the distance between their centers, do the atoms behavemost like a simple harmonic oscillator
Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 106 m
A small rubber wheel on the shaft of a bicycle generator presses against the bike tire, What is the peak emf produced by the generator at the end of 4.64 s
If we observe a stars spectrum and find that the peak power occurs at the border between blue and ultraviolet light, what is the surface temperature of the star in Celsius
Suppose in the drawing that I1 =I2 = 23.6 A and that the separation between thewires is 0.0467 m. By applying an external magnetic field (createdby a source other than the wires) it is possible to cancel themutual repulsion of the wires. This exte..
What net torque must be applied to the wheel. How several meters would the molecule.
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