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A small 0.493 kg object moves on africtionless horizontal table in a circular path of radius1.22 m. The angular speed is6.18 rad/s. The object is attached toa string of negligible mass that passes through a small hole in thetable at the center of the circle. Someone under the table beginsto pull the string downward to make the circle smaller. If thestring will tolerate a tension of no more than 105 N, what is the radius of the smallest possible circle on which the object canmove?
an electron moving parallel to the x axis has an initial speed of 4.06 x 106 ms at the origin. its speed is reduced to
What is the maximum torque on a 150-turn circular coil of radius 0.7 cm that carries a current of 1.1 mA and resides in a uniform magnetic field of 0.15 T? Answer in units of N middot m
Early skeptics of the idea of a rotating Earth said that thefast spin of Earth would throw people at the equator intospace.find the weight of the person
question1a car comes to a bridge throughout a storm and finds the bridge washed out. the driver should get to the other
A monoenergetic beam of neutrons, cp = 4 X 1 0 10 neutrons/cm2-sec, impinges on a target 1 cm2 in area and 0. 1 cm thick. How many neutron interactions per second occur in the target
A contact lens is made of plastic with an index of refractionof 1.60. The lens has a focal length of +23.0 cm, What is the radius of curvature of the outer surface
A 4.40 kg ball is dropped from a height of 14.0m above one end of a uniform bar that pivots at its center. The bar has mass 7.50kg, How high will the other ball go after collision
A standing wave is set up by reflecting radio waves from a large, flat metal dish. What is the frequency of the radio waves
An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is 281 nm, How much net energy (in terms of eV) is absorbed by the atom
A violin string vibrates at 264 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end
A 2.40*10^2 N force is pulling a refrigerator across ahorizontal surface.The force acts at an angle of 20.0degree abovethe surface. what is the work done by the pulling force
A 0.43 kg air cart is attached to aspring and allowed to oscillate. The displacement of the air cartfrom equilibrium is x = (16.1cm) cos[(1.98s-1)t + π]. estimate the maximum force exerted on it by the spring
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