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A 0.400-kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 23.0 N/m. The block rests on a friction less surface. A 5.10×10?2-kg wad of putty is thrown horizontally at the block, hitting it with a speed of 2.50 m/s and sticking.
Part A How far does the putty-block system compress the spring?
(In cm)
A damped mass-spring system oscillates at 140 Hz. The time steady of the system is 2.0 s. At t = 0, the amplitude of oscillation is 8.6 cm and the energy of the oscillating system is after that 86 J.
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A sample of 23892U is decaying at a rate of 455 decays/s . The half-life is 4.468E9yr. compute the mass of the sample
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