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Q1. A proton moves perpendicular to a uniform magnetic field, B, at 1.6 multiplied by 107 m/s and experiences an acceleration of 1.8 multiplied by 1013 m/s2 in the positive x direction while its velocity is in the positive z direction. Find out the magnitude and direction of the field.

Q2. The front of her sleeper wet from teething, a baby rejoices in the day by crowing and bouncing up and down in her crib. Her mass is 14.0 kg, and the crib mattress can be modelled as a light spring with a force constant 4.70 kN/m. She learns to use the mattress as a trampoline -- losing contact with it for part of each cycle -- as her amplitude exceeds what value?

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