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A small 0.500-kg object moves on a frictionless horizontal table in a circular path of radius 1.00 m. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone under the table begins to pull the string downward to make the circle smaller. If the string will 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 100 mg pith ball hangs by a thread in the center of a parallel-plate capacitor. The capacitor plates are 5.0 cm x 5.0 cm, Draw a free-body-diagram of the pith ball
a coil that has a resistance r and an inductance l has a power factor equal to 0.866 when driven at a frequency of
A particular engine has a power output of 4.00 kW and an efficiency of 23.0%. Assume the engine expels 7000 J of energy in each cycle. Find the energy absorbed in each cycle
A brass lidscrews tightly onto a glass jar at 20°C. To help open the jar,it can be placed into a bath of hot water. Find the size of the gap (difference in radius) that develops by this procedure
A car travelling in a large circle passes by the motorcycle that is travelling in a straight line from North to South. Both of their speedometers read 10m/s.
An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s2 in a straight line until it reaches a speed of 27 m/s. How much time elapses from start to stop
When a 6.0 µF capacitor is connected to a generator whose rms output is 30 V, What is the frequency of the source
Two cars of equal mass collide on a horizontal frictionless surface. What is the speed of the composite body (AB) after the collision
The plates of a spherical capacitor have radii 54.8 mm and 57.3 mm. Calculate the capacitance in picofarads. What must be the plate area in square centimeters of a parallel-plate capacitor with the same plate separation and capacitance?
One mole of a monatomic gass initially at 273 K and 1 atm is compressed isothermally (T constant) from volume 22.4 L to 11. 4 L, Find the final pressure and draw a PV diagram, Labeling the initial and final states 1 and 2
Three dogs are pulling on a blanket in different directions. The English shepherd is pulling north with a force of 40 N. in what direction is the boxer pulling
A +30 µC charge is placed 40 cm from an identical +30µC charge. How much work would be required to move a +0.41µC test charge from a point midway between them to a point 5cm closer to either of the charges?
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