Which of these example would illustrate that work in being done? A) an airplane sits on the runway ready to takeoff B) a weightlifter attempts to pick up the barbell, but it does not move C) a construction worker pushes on a concrete wall until he becomes exhausted D a high school freshman lifts a backpack full of textbooks onto her shoulder

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

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.