The natural phenomena shown by the rainbow is

Dispersion of the light rays.

Explanation:

When the light rays from the Sun fall on the water droplets, it disperses the light rays.

Hope it helps.

found in the nucleus

has mass of one amu

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2