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Q1. A spring stiffness 900 N/m and relaxed length 1m stands vertically on a table. You hold a block of mass 1 kg barely touching the top of the spring. Assume you let the mass down onto the spring certain distance very slowly and view the mass is not moving at this point. How much did the spring compress?
Q2. Consider a system of three non interacting identical bosons that moves in a common external one-demention harmonic oscillator potential. Find out the energy level and wave functions of the ground state, the first state, and the second state of the system.
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A 28.0 {rm kg} child plays on a swing having support ropes that are 2.20 {rm m} long. A friend pulls her back until the ropes are 45.0^circ from the vertical and releases her from rest.
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