Ultrasound refers to sound waves that have frequencies that are higher than humans can hear. information from ultrasound waves that are reflected off objects can be used to make images. dr. nolas is using an ultrasound machine to make images of objects that are in a liquid. the machine produces a wave that moves through the liquid at a speed of 1,500 m/s and has a frequency of 25,000 hz. what is the wavelength of the wave moving through the liquid

- "the most famous structure by far at saqqara is djoser's step pyramid. dating from the 3rd dynasty (2667—2448 bc), it was the first all-stone complex ever built on earth."

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1.the 80s' fashion for men was like a mixed bag that had skinny tights, leather pants, and jackets, parachute pants (or hammer pants), leg warmers, very short shorts, ripped and stone-washed denims, frilly puff-sleeved shirts, oddly striped shirts, skinny neck ties, hawaiian shirts, jams, nylon tracksuits in neon colors.

2.

3.colored tvs, malls, telephones

explanation:

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they were citizens but they could not vote and they did could not get involved into a political situation during that time.