In 6 seconds , a total of 3 waves crash into a cliff. The distance between 2 adjacent waves crests on the water is 8 meters. The frequency of the waves is 0.5 Hz (true or false ?)

that is true   : ) hope this you

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

what bodys are there orbiting?

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%