What are non-renewable energies called?

d.) circle motion requires a force to give it a centripetal acceleration.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

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.  

give me abc and i will get it for u.