Answer:
The structure of the earth divides into three main layers, the core that is the innermost, the mantle, and the crust. The earth's crust is the last solid layer of the planet, it has a thickness of between 5km and 70km.
It is the thinnest layer compared to the others that have thicknesses of hundreds to thousands of kilometers.
The crust is also the least dense layer compared to the mantle and the core.
It has an average density of , while that of the mantle is and that of the core is on average .
Answer:
Explanation:
The total kinetic energy of both electrons will be electrostatic potential energy, when the electrons reach the minima distance due to electrostatic repulsion. Then, you have:
me: mass of the electron
q: charge of the electron
k: Coulomb's constant
you take into account that v2=3v1=3v and do rmin the subject of the formula:
Answer:
The atomic mass of an element is the average mass of the atoms of an element, according to google. Sum of protons and neutrons in nucleus is the mass number and multiply by 1 amu gives you the mass of the atom