According to the bohr model of the hydrogen atom, visible radiations of light from atoms are directly due to electrons jumping from an inner orbit to an outer orbit. ejection of protons from the nucleus. electrons falling from an outer orbit to an inner orbit. rotation of electrons in their orbits.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

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.