Many Christians celebrate Easter Sunday as the day of Jesus Christâs resurrection, which is written in the New Testament of the Christian bible. According to the Gospel of John in the New Testament, Mary Magdalene came to the tomb where Jesus was buried and found it empty.
Say you want to face off a 4-inch diameter part and want to achieve very high and consistent surface finish. So you run it fast, at 3,000 surface feet. You have a 6,000-rpm lathe and extraordinary faith in your chuck to hold on to the part.
After debating which to use, they combined the two, which is why DVDs did not make it to America until 1997. Although similar to a CD (Compact Disc), DVDs are more densely packed with data and spin faster. DVDs hold seven times more information and spin three times faster than a CD. The rotational speed, or angular velocity, of a DVD goes between 570-1600 rpm (rotations per minute). The closer to the center of the disc, the faster it spins and which is why there is a range for the angular velocity and not one specific number. This means the read head passes the same length at all times and radii.