In most radioactivity, the entire mass of something does not get changed to energy.

It was hopeless to attempt to go over the entire mass of work in short hours or days.

Individual soldiers were generally protected provided that the entire mass stayed together.

Firing it would freeze the entire mass into a single unit.

I saw that then entire mass of the audience was moved, and grateful to me.

The entire mass is charred except for the nose and tail.

However, in special relativity they apply to the entire mass of matter, not only to the electromagnetic part.

Air permeates my entire mass and remains there for some time.

And since it was not solid, deflecting the entire mass would be even more difficult.