Which statement describes mechanical energy? the energy that is stored in chemical bonds the energy that is associated with temperature the sum of the kinetic energy and the potential energy of an object the type of energy that is associated with electromagnetic radiation

 the sum of the kinetic energy and the potential energy of an object

Explanation:

Chemical energy is the energy stored in the bonds of molecules.

Thermal energy is the energy possessed by a body by virtue of its temperature.

Mechanical energy is the energy possessed by a body by virtue of its position and motion and thus is the sum of kinetic energy and potential energy.

Electromagnetic energy is the energy that can be reflected or emitted from objects through electrical or magnetic waves traveling through space.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the correct answer is:

a. formation of precipitation