1. The shock wave off the cockpit of the FA 18 in the figure has an angle of abo
ID: 1534108 • Letter: 1
Question
1. The shock wave off the cockpit of the FA 18 in the figure has an angle of about 55.0°. The airplane was traveling at about 1380 km/h when the photograph was taken. Approximately what was the speed of sound at the airplane's altitude?
_______m/s?
2. set the amplitude to 0.40 m, the frequency to 2.00 Hz, and the string thickness to 2 cm. Under these conditions what is the speed of the wave on the string? Note that for each of the slider settings in the simulation exactly an integer number of half-wavelengths fit in the 1.00 meter length of the string. Use that information to find the wavelength rather than relying on the wavelength displayed by the simulation, which shows only two decimal places.
_____m/s? (the answer is not 2 or 10, I tried both of these.
Explanation / Answer
we use the equation
sin = v / vs
given that
Velocity vs = 1380 km / h
= 1380 (5 /18)
= 382.26 m / s
= 55.0o
solve for v
V=sintheta(Vs)
V=382.26 sin(55)
Sin(55)=0.819
382.26(0.819)
V=313.07 m/s
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