A ball of clay has a momentum of 2 kg-m/s when it collides and sticks to another
ball of clay.
The momentum of the clay when they are stuck together is
kg-m/s

multiply 2kg by latent heat of vap

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the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.