A sound wave in a steel rail of a railroad track has a frequency of 650 Hz and a wavelength of 6.2 m. What is the speed of sound (in m/s) in this rail?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.