Which type of reaction occurs when a high energy particle collliding with the nucleus of an atom converting that atom to an atom of a different element?

Gymnast always perform on padded mats. how does the mats protect the gymnast

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer