While passing between earth and the moon, a spacecraft is momentarily located on the line connecting the centers of the two bodies and is at a distance of d = 176 km from a radio antenna on the surface of earth. the distance from the antenna to the moon is denoted by dm. scientists on earth send a command to the spacecraft, which immediately sends back a receipt confirmation signal. how long, in seconds, after the scientists send the command does it take before they learn it was received?

this means that the temperature of both substances will be equal

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

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray