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The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. At 20 °C (68 °F), the speed of sound in air is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn ), or 1 km in 2.91 s or one mile in 4.69 s.
Learn about the speed of sound in different materials, such as air and water, and how it varies with temperature and pressure. Also, find out about the Doppler effect, the apparent change in frequency of sound or light waves due to motion.
31 de may. de 2013 · On Earth, the speed of sound at sea level — assuming an air temperature of 59 degrees Fahrenheit (15 degrees Celsius) — is 761.2 mph (1,225 km/h). Because gas molecules move more slowly at...
Thus, it is reasonable that the speed of sound in air and other gases should depend on the square root of temperature. While not negligible, this is not a strong dependence. At 0°C , the speed of sound is 331 m/s, whereas at 20.0 °C, it is 343 m/s, less than a 4% increase.
Learn how sound waves travel and how the speed of sound depends on the medium and frequency. Watch a video and see examples and questions about sound waves and speed of sound.
17 de jun. de 2023 · Learn the definition, formulas, and factors of the speed of sound in different media. Find out how the speed of sound varies on Mars and what is the hot chocolate effect.
Like any wave, the speed of a sound wave refers to how fast the disturbance is passed from particle to particle. While frequency refers to the number of vibrations that an individual particle makes per unit of time, speed refers to the distance that the disturbance travels per unit of time.
