Scientist discover the preserved remains of a woolly mammoth and want to determine its age well examining a sample from the bones the scientist discover the specie man is composed of 6.25% carbon 14 carbon 14 has half life of 5730 years how old is the woolly mammoth?

adam ripon he cute then jared goff

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".

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.