Physics_50_Sample_final

Physics_50_Sample_final - Physics 50 Sample Final Exam (29...

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Sample Final Exam (29 points) by Todd Sauke (Use Midterms 1 and 2 as samples for Chapters 1 10. This is a sample for Chapters 11 16.) The multiple choice questions (conceptual) are all first, followed by the problems. Plan accordingly. Name _________________________ For multiple choice, choose the one alternative that best completes the statement or answers the question. ( 2 points each for multiple choice.) Question #1. Which of the following is an accurate statement? A) "Strain" has a meaning very close to "force". B) "Stress" has a meaning very close to "stretch". C) Tensile stress is measured in Newtons per meter squared. D) The ratio strain/stress is called the elastic modulus. E) Tensile strain is measured in meters. Question #2. The reason a decibel scale is used to measure sound intensity level is that A) the energy in a sound wave varies exponentially with the amplitude of the wave. B) the ear is sensitive over such a broad range of intensities. C) the intensity levels usually encountered are too large to be expressed in the usual exponential notation. D) the intensity levels usually encountered are too small to be expressed in the usual exponential notation. E) decibels are dimensionless. _________________ Question #3. (4 points) A transverse wave is propagated in a string stretched along the x-axis. The equation of the wave, in SI units, is given by: y = 0.009 cos(45 x + 250 t) . What is the amplitude of the wave? ____________________________ m What is the frequency of the wave? 1 point _____________________________ Hz 1 point What is the wave speed, including the sense of direction, along the x-axis? _________________________________ m/s
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Physics_50_Sample_final - Physics 50 Sample Final Exam (29...

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