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Chapter 1: Q7CQ (page 32)
Classical physics is a good approximation to modern physics under certain circumstances. What are they?
Classical physics will be a good approximation for quantum physics, only for those systems that are composed of large number of particles.
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What is the ratio of intensities of two sounds of identical frequency if the first is just barely discernible as louder to a person than the second?
A ball is thrown straight up. It passes a 2.00 m highwindow 7.50 moff the ground on its path up and takes 1.30sto go past the window. What was the ball’s initial velocity?
Diffraction spreading for a flashlight is insignificant compared with other limitations in its optics, such as spherical aberrations in its mirror. To show this, calculate the minimum angular spreading of a flashlight beam that is originally \(5.00\,{\rm{cm}}\) in diameter with an average wavelength of \(600\,{\rm{nm}}\).
An infant’s pulse rate is measured to be. What is the percent uncertainty in this measurement?
Find the components of \({v_{tot}}\) along a set of perpendicular axes rotated \(30^\circ \) counterclockwise relative to those in Figure 3.55.
Figure: The two velocities\({{\rm{v}}_{\rm{A}}}\)and\({{\rm{v}}_{\rm{B}}}\)add to give a total \({{\rm{v}}_{{\rm{tot}}}}\)
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