Homework Help: physics

Posted by Anonymous on Monday, December 10, 2012 at 12:55am.

An atomic nucleus of radon initially moving at 515 m/s emits an alpha particle in the direction of its velocity, and the new nucleus slows to 417 m/s. If the alpha particle has a mass of 4u, and the original nucleus of radon had a mass of 222u, what speed does the alpha particle have when it is emitted?

physics - Anonymous, Tuesday, December 11, 2012 at 8:17pm
Use conservation of momentum

222*515 = 417*(222-4) + 4*valpha

where valpha is the speed of the alpha particle

Answer this Question

Related Questions

physics - An alpha particle collides with an oxygen nucleus, initially at rest. ...
physics - An alpha particle collides with an oxygen nucleus, initially at rest. ...
physics - An alpha particle, the nucleus of a helium atom, is at rest at the ...
physics - What are the atomic number and the atomic mass of the element formed ...
p - A uranium nucleus (mass 238 u), initially at rest, undergoes radioactive ...
physics - In Rutherford's famous scattering experiments that led to the ...
physics - In Rutherford's famous scattering experiments that led to the ...
S103 - Which element results if 2 protons and 2 neutrons are ejected from a ...
Physics - When a 226/88 Ra nucleus decays by emitting an alpha particle, what is...
PHYSICS - An alpha particle (which has two protons) is sent directly toward a ...

For Further Reading

First Name:
School Subject:
Answer: