Động lượng của photon thay đổi thế nào khi bước sóng của nó giảm đi một nửa:

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

connect the batteries in series and hope

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

answer(20) psi;