42. A sound wave in air has a period of .0015 s . What is the approximate wavelength of the sound wave? Remember that the average speed of sound in air is \( 343 \mathrm{~m} / \mathrm{s} \).

To find the wavelength of the sound wave, you can use the formula: \( \text{Wavelength} = \text{Speed} \times \text{Period} \). Given that the speed of sound in air is 343 m/s and the period is 0.0015 s, the wavelength would be \( 343 \, \text{m/s} \times 0.0015 \, \text{s} = 0.5145 \, \text{m} \) or approximately 0.51 meters. Now, the calculation assumes ideal conditions, but remember that various factors, like humidity and temperature, can affect sound speed. It's always good to keep those in mind especially in real-world applications such as sound engineering or acoustics!