Me i ned just with at least one!

Sorry if the spacing is off, try to read it
so

1. the books will be more likely to fall over the slower you pull out the pillow
2. I tried a 5 pound book and did it 10 times each time, I did each speed twice so the speeds are 1,1,2,2,3,3,4,4,5,5
3. this illustrates the law of inertia where an object at rest stays at rest until an outside force acts apon it, bsaically the faster you moved the pillow, the less the pillow affected the 'staying-put'ness of the books

1. the middle
2. the middle
3. actually test it (answer is a close to the middle, but off to the side that is sharpened since it has less weigh)

1. the rice danced and bounced around
2. the straw vibrated. if you're lucky, sounds come out like a flute or wind instument (not brass)
3. the clips danced and bounced around like the rice one
4. the kernals vibrated and moved also

The diaphragm is what i think ur talking about