Pearson+ LogoPearson+ Logo
Start typing, then use the up and down arrows to select an option from the list.

Multiple Choice

A string emits an unknown sound. You strike a tuning fork which emits a sound at EXACTLY 300 Hz, and you hear a beat frequency of 20 Hz. You then tighten the string, increasing the tension in string. After you pluck the string and strike the tuning fork, you hear a new beat frequency of 30 Hz. What is the unknown frequency of the string, originally?


Watch next

Master Beats with a bite sized video explanation from Patrick Ford

Start learning