Asound wave with a frequency of 400 hz is moving through a solid object. if the wavelength of the sound wave is 8 m, what is the speed of sound traveling through the solid object?

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.