The kinetic energies and speeds of the two helium atoms are 92.2 keV and [tex]1.49*10^6 m/s[/tex]
An atom a fundamental piece of matter. It is made up of three tiny kinds of particles called subatomic particles such as protons, neutrons, and electron.
Beryllium is a steel-gray metal that is brittle at room temperature.
The kinetic energy of an object is the energy that possesses due to its motion.
A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with one or two neutrons depending on the isotope and held together by the strong force.
Let the two helium atom move in opposite direction along the x axis speed [tex]V_1[/tex] and [tex]V_2[/tex]. Convention of momentum along with the [tex]x[/tex] direction. ([tex]P_x, initial = P_x, final[/tex]) given
[tex]0=m_1V_1-m_2V_2 on V_1=V_2[/tex]
The energy is in the form of the total kinetic energy of the two helium atoms
[tex]H_1+H_2=92.2 keV[/tex]
Because [tex]V_1=V_2[/tex], it follows that [tex]H_1=H_2=46.1 keV[/tex] therefore
[tex]v = \frac{2*H_1}{m_1} = \sqrt{\frac{2*(46.1*10^3eV)(1.602*10^{-19} J/eV)}{(4.004)*(1.6605*10^{-27}kg/m)} } = 1.49*10^6 m/s[/tex]
[tex]V_2=V_1=1.49*10^6 m/s[/tex]
Grade: 9
Subject: chemistry
Chapter: atom
Keywords: beryllium, helium, energy, the kinetic energies, speeds
