What happens after an elastic collision between a hydrogen atom at rest and a helium atom moving 150 m/s? Which direction will the particle move after the collision? Which particle will have a higher speed after the collision? What happens when a neutron moving at 150 m/s hits a hydrogen atom at rest?

  1. 0
  2. 1
asked by Mina
  1. For an elastic collision, both kinetic energy and momentum are conserved.

    Conservation of momentum

    m(He)*v(He,initial) = m(He)*v(He,final) + m(H)*v(H)
    where m(He) is the mass of the Helium,
    v(He, inital) is the initial speed of the Helium , etc. . .

    Conservation of kinetic energy:

    0.5*m(He)*v(He,initial)^2 = 0.5*m(He)*v(He,final)^2 + m(H)*v(H)^2

    you should be able to look up the masses of a hydrogen atom and a helium atom. Then, you have two equations with 2 unknowns (v(He, final) and v(H)). You can use algebra to solve for these two values.

    For the second part, repeat this problem by replacing the helium with a neutron.

    posted by Jennifer

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    Which statement correctly describes an atom of the element helium? A. An atom of helium has its valence electrons in it's first energy level. B. An atom of helium most similarly behaves like an atom of hydrogen since it is in the
  2. physics

    A neon atom (m = 20.0 u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 55.2° angle from its original direction and the unknown atom travels away at a 51.8°
  3. Physics

    A helium-4 atom falls from a height h into a tank of gaseous helium atoms at 300 K. What is h in meters if the temperature of the helium atoms remains at 300 K after the falling atom enters the tank? Details and assumptions The
  4. Chemistry/reading

    Although Rutherford's model was highly successful, scientists realized that it was incomplete. For example, hydrogen atoms contain one proton, and helium atoms contain 2, yet a hydrogen atom has only 1/4 the mass of a helium atom.

    What is the chemically combined substance of a hydrogen atom and a helium atom. please help me because i really don't know this is confusing really please and thankyou Hydrogen atoms don't normally combine with helium atoms. In
  6. Chem---DrBob222

    Calculate the oxidation # for each atom in the molecule below. Can you help me with the rest. Thank you!!! H H H H / / / / H -- C ---C ===C ----N .. / / H H Group # # of E Oxidation # H 1 0 1 x 7 = 7 C 4 7 C 4 C 4 N 5 3 H atom
  7. Chemistry

    A helium atom has a smaller atomic radius than the hydrogen atom. Explain why.
  8. physics

    how do i go about in solving this? A helium atom (mass 4.0 u) moving at 596 m/s to the right collides with an oxygen molecule (mass 32 u) moving in the same direction at 402 m/s. After the collision, the oxygen molecule moves at
  9. physics

    An ionized helium atom has a mass of 6.6*10^-27kg and a speed of 4.4*10^5 m/s. The atom moves perpendicular to a 0.75-T magnetic field on a circular path of radius 0.012m. Determine whether the charge of the ionized helium atom is
  10. physics

    The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.0 10-15 m. The single electron in a hydrogen atom normally orbits the nucleus at a distance of 5.3 10-11 m. What is the ratio of the density of the

More Similar Questions