Pls help I’m stuck on this part

As you begin your trip down the hill you increase your speed resulting in a transformation from potential energy to kinetic energy.

Explanation:

At the top of the mountain, you have potential energy. But as you start moving down the mountain, your speed increases and have a lot of kinetic energy.

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.