Test: MCAT Physical

At a local concert, a speaker is set up to produce low-pitched base sounds with a frequency range of 20Hz to 200Hz, which can be modeled as  sine waves. In a simplified model, the sound waves the speaker produces can be modeled as a cylindrical pipe with one end closed that travel through the air at a velocity of , where T is the temperature in °C.

1.

What is the wavelength of a 150Hz beat at 20ÂşC?

4.2m

3.1m

1.7m

2.3m

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