Which statement best describes frequency and pitch?
a. are opposite of wavelength and velocity
b. is perceived
c. are the same as wavelength and velocity
d. are never found in a description of the doppler effect

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system

Are formed where bumps from two surfaces come into contact ?

At what time would the magnitude of the velocity reach 36.00 km/hr