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**1. Homework Statement**

Standing-wave vibrations are set up in a crystal goblet with four nodes and four antinodes equally spaced around the 15.0 cm circumference of its rim. If transverse waves move around the glass at 920 m/s, an opera singer would have to produce a high harmonic with what frequency to shatter the glass with a resonant vibration?

**2. Homework Equations**

V=F*wavelength

**3. The Attempt at a Solution**

if someone could explain how to do this or do it out it would be good because i have one more chance to get it right otherwise its wrong