Answer:
I am a king but also a common device of measure. What am I?
A house where you are brought, If they find you or get caught. If you cross the government, This is where you will be sent.
What you become during a workout?
I occur twice in eternity. And I'm always within sight.
The more you look at it, The less you see.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.