When discussing discordant and harmonious sound waves, which statement is false? a. low ratios of the frequencies of the original and resultant waves indicate discordant waves. b. if the original waves combine to form irregular displacements of air, the sound will be discordant. c. knowing the frequencies of the original waves is useful in determining if the result will be discordant or harmonious. d. both types of waves are the result of component waves with different frequencies.

' A ' is a false statement. Please don't make me type it all out.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

490 n  f=125n a=2.5m/s2