When astronomers measure the abundance of atomic elements in what appear to be isolated and untouched parts of
the universe, they always detect the same amounts of hydrogen and isotopes of helium and lithium. explain why these
observations are powerful evidence in support of the big bang theory.

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

multiply 2kg by latent heat of vap