8. a wave is known to have a frequency of 20 hz, wavelength of 0.5 m, and amplitude of 1.2 m. if the amplitude of the wave is doubled, the wave will have a frequency that is: larger, smaller, or the same? 9. a wave is known to have a frequency of 20 hz, wavelength of 0.5 m, and amplitude of 1.2 m. if the frequency of the wave is doubled, the wave will have a wavelength that is: larger, smaller, or the same? 10. a wave is known to have a frequency of 20 hz, wavelength of 0.5 m, and amplitude of 1.2 m. if the amplitude of the wave is doubled, the wave will have a speed that is: larger, smaller, or the same?