i’m 1927 on mount wilson outside pasadena, california edwin hubble observed hydrogen spectra from distant galaxies that were red shifted. what was the change in the waves that he observed? what caused this change? what periodic phenomenon was this?

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

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this