An atom of uranium 238 emits an alpha particle (an atom of He) and recoils with a velocity of 1.895 * 10^ 5 m/sec . With velocity was the alpha particle released ?

The velocity of released alpha particle is

Explanation:

According to law of conservation of momentum, momentum can neither be created nor be destroyed until and unless, an external force is applied.

For a system:

where,

= Initial mass and velocity

= Final mass and velocity

We are given:

Putting values in above equation, we get:

Hence, the velocity of released alpha particle is

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation: