physics
posted by Scott .
A 10 g particle undergoes Simple Harmonic Motion with an amplitude of 2.0 mm, a maximum acceleration of magnitude 8.0 X 10^3 m/s^2, and an unknown phase constant, theta. What are a.) the period of the motion, b.) the maximum speed of the particle, and c.) the total mechanical energy of the oscillator? What is the magnitude of the force on the particle when the particle is at d.) its maximum displacement and e.) half its maximum displacement?

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What is the magnetic force acting on an electron if its speed is 3.0 × 106 meters/second and the direction is perpendicular to a magnetic field of 0.020 teslas? The value of q = 1.6 × 1019 coulombs.
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