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So lotroas PHYS 132 Name: Quiz 2 1. (2 points) Various masses (m7) are hung from a spring, hanging vertically at equilibrium, and the amount of stretch (x) is mcasurcd. When x vs. m is plotted, the data points fall along a straight line. What is the slope of this line? KxXu wg ) A)k B) gk C) kig D) gk x 3 mo 2. (2 points) A gamma ray (a pulse of electromagnetic energy) has a frequency of 2.42 x 1020 Hz. What is the ratio of its wavelength to the radius of the nucleus which produced it (radius = 5.0 x 10-13 cm)? c= 3.0 x 108 m/s cat “2 A Ay2a8 B) 39.4 C) 1.21 x 108 D) 0.015 As L2d atom 3. (2 points) Given the graph of the shape of a wave at f= | sec, plot the displaccment y as a function of time atx = 6 cm. Make sure to label the time axis with the appropriate numbers. Assume that the wave maintains its shape. 2 cm/s y , — veel TN L _L | r ‘ x (cm) los us gs as se OO 4, (4 points) A water wave is described by the equation: y(x,6) = (3.75 em) cos(0.450 cm™x +5.40 912) where y is the height above flat sca level. From this equation, determine (a) the propagation speed of the wave (b) the maximum vertical speed of a cork floating in the water A) ke Bs 64st." 8) As 5.4Fem we Be soy" Vmax * Avg 28 em: T4096! fe. Fos! . CA . ‘ ” Visare K 7 oASOcg! ~ lars = 20.L5 = 
