gc textbook chapter 11 Vibrations and Waves (id: d0f1fb558)

本题目来源于试卷: gc textbook chapter 11 Vibrations and Waves，类别为 通用国际物理

[填空题]
One end of a horizontal str(qobh:6pao/ eingdt7,,qx 0j;xnp rirw5:jjjg-7qk zqc5*j-k c is attached to a small-amplitude mechanical 60-Hz vibrato-j07jqrz n:j7w5djcq, xj-xr;k t*gk ,pcq5i r. The string’s mass per unit length is $3.9 \times10^{ -4}$ kg/m The string passes over a pulley, a distance L = 1.50 m away, and weights are hung from this end, Fig. 11–53. What mass m must be hung from this end of the string to produce
(a) one loop,(round to one decimal place) $\approx$    kg
(b) two loops,    kg
(c) five loops of a standing wave? Assume the string at the vibrator is a node, which is nearly true.   kg

参考答案:
空格1: 1.3±2%  空格2: 0.32±2%  空格3: 0.052±2% 


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