Speed of sound equation
How do you calculate the speed of sound?
SPEED=DISTANCE/TIME. To work out the speed of the sound in metres per second, divide the distance in metres by the average time in seconds. For example 170 metres divided by 0.50 seconds = 340 m/s.
What is the speed of sound in physics?
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 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s.
How do you calculate the speed of sound and temperature?
temperature ϑ (theta) in degrees Celsius (centigrade): Speed of sound c ≈ 331.3 + (0.6 × ϑ) in m/s. That gives e.g. at a temperature of ϑ = 20°C a speed of sound of: c ≈ 331.3 + (0.6 × ϑ) = 331.3 + (0.6 × 20) = 343.3 m/s.
How fast does sound travel per second?
The speed of sound through the atmosphere is a constant that depends on the daily temperature. On a standard day at sea level static conditions, the speed of sound is about 760 mph, or 1100 feet/second. We can use this knowledge to approximately determine how far away a lightning strike has occurred.
What is the formula of sound?
Assuming the sound wave moves with a velocity of 350 m/s, what is the wavelength of the wave? Let = wavelength. Use v = f • λ where v = 350 m/s and f = 600 Hz. Rearrange the equation to the form of λ = v / f.
What is the speed to break the sound barrier?
about 770 mph
What is mach speed?
As the speed of the object approaches the speed of sound, the flight Mach number is nearly equal to one, M = 1, and the flow is said to be transonic. At some places on the object, the local speed exceeds the speed of sound.
What is the maximum speed of sound?
At sea level, at a temperature of 21 degrees Celsius (70 degrees Fahrenheit) and under normal atmospheric conditions, the speed of sound is 344 m/s (1238 km/h or 770 mph). The speed varies depending on atmospheric conditions; the most important factor is the temperature.
Does sound travel better in cold air?
Instead of the sound wave being transmitted in a single direction, it is refracted away from the warmer air aloft and back towards the surface. The wave then oscillates between the interface of the colder air, the overlying warmer air, and the ground.
Where does sound travel fastest?
What is the speed of sound called?
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 colder temperatures, that slows the speed of sound; sound moves faster through warmer air.
What is the 30 30 rule for lightning?
Use the 30/30 rule! Go indoors if you see lightning and can’t count to 30 before hearing thunder. Stay inside for 30 minutes after hearing the last clap of thunder.
Does sound travel faster in water?
While sound moves at a much faster speed in the water than in air , the distance that sound waves travel is primarily dependent upon ocean temperature and pressure.