3 Gusts of wind make the Sears Tower in Chicago sway back and forth, completing a cycle every 10 seconds. A train of freight cars, each 6 m long, rolls by you at the rate of 3 cars every 2 seconds. The speed of sound in water is greater than the speed of sound through steel. 8 Two transverse waves have the same amplitude, frequency, and wavelength. If they are out of phase, the resulting superposition will be a wave with twice the amplitude.
Sound waves traveling through air of uneven temperatures are bent from warm air toward cool air.
As you are standing on the sidewalk, a firetruck zooms past with its siren wailing. The frequency of the siren decreases as the truck approaches you. The speed of light is fastest in a vacuum. TRUE 13 Light incident on a surface may be transmitted, if the medium is opaque. The sky is blue because the atmosphere absorbs all the red light, but allows blue light to pass unimpeded.