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Speed of Sound Formula:
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The speed of sound in miles per hour (mph) is approximately 767 mph at 20°C (68°F) in dry air. This value varies with temperature, humidity, and atmospheric pressure.
The calculator uses the simplified formula:
Where:
Explanation: The speed of sound increases by approximately 1.1 mph for each degree Celsius increase in temperature.
Details: Knowing the speed of sound is crucial for various applications including aviation, meteorology, acoustics, and military operations. It helps in calculating Mach numbers, sound propagation, and sonic boom effects.
Tips: Enter temperature in degrees Celsius. The calculator will provide the approximate speed of sound in mph at that temperature.
Q1: Why does the speed of sound vary with temperature?
A: Sound travels faster in warmer air because the molecules move more rapidly and transmit vibrations more quickly.
Q2: What is the speed of sound at different altitudes?
A: The speed decreases with altitude due to lower temperatures, though pressure and humidity also play roles.
Q3: How accurate is this approximation?
A: This provides a reasonable estimate for typical atmospheric conditions, but precise calculations require more complex formulas accounting for humidity and pressure.
Q4: What is Mach 1 in mph?
A: Mach 1 equals the speed of sound, so approximately 767 mph at 20°C. This varies with environmental conditions.
Q5: Does sound travel faster in water or air?
A: Sound travels about 4 times faster in water (approximately 3,350 mph) than in air due to water's higher density.