In a lab, resonance tubes are used to determine experimentally the speed of sound. Using the data given, evaluate the best approximation for the speed of sound.
A) 3x10^8 m/s
B) 170 m/s
C) 340 m/s
D) 570 m/s

What is the length x of the side of the triangle below? (hint: use the cosine function)

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.

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •