The velocity of sound in air at stp (standard temperature and pressure) is approximately 344 m/s. if the frequency of the sound wave is = 4.8 khz, what is the wavelength in cm?

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?