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A man walking on a tightrope carries a long a pole which has heavy items attached to the two ends. If he were to walk the tight-rope with just a pole, what difference would it make to his balance? Discuss this in terms of angular rotation, angular momentum, and moment of inertia.
A textbook of mass 2.10kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.190m, What is the tension in the part of the cord attached to the book
A 5.0-kg object with a speed of 4.0 m/s collides head on with a 10-kg object moving toward it with a speed of 3.0 m/s. what is the post-collision speed of the 5.0-kg object
n air-filled spherical capacitor is constructed with inner and outer shell radii of 7.00 and 14.0 cm, respectively. Calculate the capacitance of the device
In order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). Find the mass of the astronaut
A lens which is 40.0 cm from an object forms an image of the object on a card 20.0 cm away. Determine what is the focal length of the lens? If the height of the image is .75 cm, what is the height of the object?
What is the minimum time necessary for crossing.
What are magnitude and direction of net electrostatic force
Relative to the ground, determine the angle of the velocity vector of the package just before impact.
A point charge of +6.3? C is located 0.31 m from a second point charge of -4.8? C. What is the absolute magnitude of the force on each charge?
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1020 Hz. The bird-watcher, however, hears a frequency of 1060 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
In a simple atom, the electrons making transitions between outermost energy levels and the innermost energy levels give rise to photons with the reddest colours.
How many electrons should be transferred from the plate. When you enter your answer, leave off the unit rm dB.
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