Rosa Parks sparks Civil Rights Movement. On this day in 1955, Rosa Parks, an African-American, was arrested and charged with violating a Montgomery, Ala., ordinance that required her to relinquish her bus seat to a white passenger. Her act of defiance sparked a yearlong bus boycott in the segregated city.
View full size image. The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light. In miles per hour, light speed is, well, a lot: about 670,616,629 mph. If you could travel at the speed of light, you could go around the Earth 7.5 times in one second.
Answer by Clindberg4. Confidence votes 627. As the speed of light is thought to be an absolute speed (it is not, but close enough) we use it and a time frame, usually a year, to describe how far things are away.The term is: Light Year (the distance light will travel in a year) roughly 6 trillion miles.ivide the total distance by the total time to get the average speed. Or, when you need the speed at a certain time, you can differentiate the fuction of distance(t) over tim â¦ e. This can be compared with dividing the distance (of a really really really short timespan) by the same really really really short timespan).