A collection from various sources. Waves, Sound 1. Transverse seismic waves, or S-waves, travel through the mantle of the earth but are unable to pass through the molten core. A youngster in a boat watches waves on a lake passing with a half-second pause between each crest.
Dolphins operate underwater by using compression waves with high frequencies.
While heading for a moth, a horseshoe bat emits a stream of ultrasonic wavetrains having a frequency of 83 kHz, each lasting 5 milliseconds. The human chest cavity resonates at around 8 Hz. By international agreement, most orchestras tune to a frequency of 440 Hz, which is called A440. If total destructive interference occurs at 0.5, 1.0, 1.5, 2.0, 2.5, etc. Explain the effect one hears in the voice upon exhaling helium.