remains

[Unregistered]

Is remains used with a plural verb or singular?

The remains of the bomb is nothing but these ashes

The remains of the bomb are nothing but these ashes

I also checked the dictionary and remains can mean a dead body.
so maybe it should be singular all the time
this is the remains of the man=the is the dead body of the man

[Casiopea]

Plural.

Ex: The remains ... are nothing but these ashes.

Correction
These are the remains of the man.<noun>
These are the man's remains. <noun>
This is what remains of the man. <verb>