A5.20 -kg ball is dropped from a height of 11.5 m above one end of a uniform bar that pivots at its center. the bar has mass 5.50 kg and is 6.40 m in length. at the other end of the bar sits another 6.00 how high will the other ball go after the collision? kg ball, unattached to the bar. the dropped ball sticks to the bar after the collision.

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

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.