How did the artist, duchamp, use movement in the piece above entitled, descending a staircase?

This painting is by james whistler, and is entitled, symphony in blue and pink. what is the subject matter of this piece?

1520 is the date scholars generally give for the end of the? a. northern renaissance b. high renaissance c. gothic period d. mannerism period

What is one of the most effective ways that artists create space in two dimensional art?