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Chapter 11: Q9Q (page 292)
What, approximately, is the percent uncertainty for a measurement given as\({\bf{1}}{\bf{.57 }}{{\bf{m}}^{\bf{2}}}\)?
The correct answer of percent uncertainty is 0.6%.
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Estimate the average power of a moving water wave that strikes the chest of an adult standing in the water at the seashore. Assume that the amplitude of the wave is 0.50 m, the wavelength is 2.5 m, and the period is 4.0 s.
What frequency of sound would have a wavelength the same size as a\(0.75\;{\rm{m}}\)wide window? (The speed of sound is 344 m/s at\(20^\circ {\rm{C}}\).) What frequencies would diffract through the window?
An object with mass 2.7 kg is executing simple harmonic motion, attached to a spring with spring constant k =310 N/m.When the object is 0.020 m from its equilibrium position, it is moving with a speed of 0.55 m/s. (a) Calculate the amplitude of the motion. (b) Calculate the maximum speed attained by the object.
A sound wave in air has a frequency of 282 Hz and travels with a speed of 343 m/s. How far apart are the wave crests (compressions)?
A clock pendulum oscillates at a frequency of 2.5 Hz. At t= 0, it is released from rest starting at an angle of\(12^\circ \)to the vertical. Ignoring friction, what will be the position (angle in radians) of the pendulum at (a)t= 0.25 s, (b) t = 1.60 s, and (c) t = 500 s?
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