Arifle of mass m is initially at rest, but is free to recoil. it fires a bullet of mass m with a velocity +v relative to the ground. part a after the rifle is fired, its velocity relative to the ground is after the rifle is fired, its velocity relative to the ground is −m/m√v. −mv/(m+m). −mv/m. −v.

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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.

answer is slate

hope this