object of unknown material has a weight of 147 N when it is measured with a spring scale. If the object is submerged in water, the scale reads 91.5 N. What is the density of the unknown object?

College Physics
11th Edition
ISBN:9781305952300
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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  1. object of unknown material has a weight of 147 N when it is measured with a spring scale. If the object is submerged in water, the scale reads 91.5 N. What is the density of the unknown object?
  1. 3.10 kg mass is oscillating in simple harmonic motion at the end of a frictionless horizontal spring with spring constant k = 54 N/m. The mass has a speed of 1.21 m/s when it passes through the equilibrium position. How fast will it be going when it is 0.16 m away from equilibrium?
  1. One particular string on a harp has a length of L = 0.850 m and plays a note of frequency f = 130.8 Hz. If the string is placed under a tension of 94.8 N, what linear density μ should the string have?
  1. When the harpist plucks a string on their harp it produces a sound with a sound intensity level of 52 dB. If 8 harp strings were played simultaneously, each at 52 dB, what would be the total sound intensity level?
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