19. a group of elementary students were playing shuffle board on the playground, one student pushed
the puck toward the opposite side of the game board, the student thought the puck would continue all
the way to the other side, but the puck stopped half-way down the board, explain in terms of force why
the puck failed to slide all the way to the opposite side of the board

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make   gliitsh plesea   !

d. planting trees

the trees take in carbon to make oxygen.

it is called the mitotic spindle