A sound wave from a brass bell passes through the air with a wavelength of 3.5 m. When the sound wave originated in the brass bell, its wavelength was
47 m. If the sound wave has a constant frequency of 100 Hz, what was its
speed as it traveled through the brass bell? (The equation for wave speed is v
= fx.)
A. 3,500 m/s
B. 470 m/s
C. 4,700 m/s
D. 350 m/s

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy