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What is the maximum mass that can hang without sinking from a 90cm diameter Styrofoam sphere in water? Assume the volume of the mass is negligible compared to that of the sphere.
A 75-kg man is riding in a 75-kg cart at 1.0 m/s. He jumps off in such a way as to land on the ground with no horizontal velocity
a ball of mass m bounces horizontally back and forth between two heavy vertical walls each of mass mgtgtm. the
A 100 kg quaterback is traveling 5 m/s and is stopped by atackler in 1 second, find the initial momentum ofthe quater back
A lovesick lad wants to throw a bag of candy and love notes into the open window of his girlfriend's bedroom 10.0 m above. At what velocity should she throw the bag
two identical springs of spring constant 6770 N/m are attached to a block of mass 0.225 kg. What is the frequency of oscillation on the frictionless floor
A certain radioisotope has a half-life of 11.0 days. What fraction of an initial sample of this isotope remains after 22.7 days
Light visible to humans consists of electromagnetic waves with wavelengths (in air) in the range 400-700 nm (4.0 10-7 m to 7.0 10-7 m). What are the frequencies of electromagnetic waves that are visible
A sinusoidal wave travels along a stretched string. A particle on the string has a maximum velocity of 0.900m/s, What is the frequency and amplitude of the wave
a 15kg child stroller is moving towards you with a speed of 2.5m/s. how much work is required to stop the stroller
A gas with initial conditions (P,V,T)i expands isothermally until the final volume=8.192 times the initial volume, find the ratio of the final pressure to the intial pressure
A 120-V motor has mechanical power output of 3.00 hp. It is 88.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
Then, a thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed the spheres still repel but with a force of F2 = 0.100 N. Using this information, find the initial charge on each sphere, q1 and ..
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