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A basketball has been left out in the cold. The next day you find that it has become soft. What do you do to get it back to shape and why?

a) Leave it alone to warm up
b) Pump it up a little
c) Get a new basketball


Sagot :

The cold made the particles clump to together so the answer could be a or b
All three answers would adequately solve your "flat basketball" problem, but the answer your teacher is probably looking for is a). When the air inside the basketball cooled off, the particles came closer together, causing the ball to deflate. If the air inside the ball was warmed back up, the particles would spread out more (the air would expand) and the ball would inflate again. 
Hope that helps!!