For example, it doesn't clump in the center of the room. It's always more at the edges.
2006-07-31 18:27:44 · 7 answers · asked by Glenn P 1 in Science & Mathematics ➔ Physics
less air movement...
2006-07-31 18:30:46 · answer #1 · answered by R J 7 · 0⤊ 0⤋
The slightest air movement will push airborne dust through the air. When the dust gets to a wall, any wall it will collide with the wall, and will fall staright down from gravity pulling it. That is why dust will clump in the perimeter of a room, rather than in the middle of the room
2006-08-07 04:58:47 · answer #2 · answered by donovan49_e71 2 · 0⤊ 0⤋
Because the air has a very low kinetic energy at the perimeter of room, so dust clump at the same position from centre of room.
2006-08-01 01:32:42 · answer #3 · answered by Vijay Gupta 1 · 0⤊ 0⤋
R_J only got it partially right. Dust clump actually more due to static charges rather than air movement, if you have cleaned any fan blades before you'd realized how much dust actually has accumulated on the fan blades, the funny thing is that you can't really say there isn't rapid air movements around a fan blade can you?
You may wish to read up on electrostatics however see wiki link
2006-08-01 01:43:57 · answer #4 · answered by unstable 3 · 0⤊ 0⤋
That's very simple actually. It is because we move through rooms, creating air currents with each step that push toward the walls.
2006-08-01 01:32:18 · answer #5 · answered by cyanne2ak 7 · 0⤊ 0⤋
Becuase of the friction of wall surface it got stuck up there.
2006-08-01 03:14:04 · answer #6 · answered by skahmad 4 · 0⤊ 0⤋
Simple, because it can't go beyond the walls.
2006-08-01 02:22:34 · answer #7 · answered by ideaquest 7 · 0⤊ 0⤋