Why would a flat sheet of paper and a wad of paper not fall through the air at the same rate

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

J. j. thomson’s experiment disproved the theory that an atom