Transient electromagnetics, (also time-domain electromagnetics / TDEM), is a geophysical exploration technique in which electric and magnetic fields are induced by transient pulses of electric current and the subsequent decay response measured. TEM / TDEM methods are generally able to determine subsurface electrical properties, but are also sensitive to subsurface magnetic properties in applications like UXO detection and characterization. TEM/TDEM surveys area very common surface EM technique for mineral exploration, groundwater exploration, and for environmental mapping, used throughout the world in both onshore and offshore applications.
Two fundamental electromagnetic principles are required to derive the physics behind TEM surveys: Faraday's law of induction and Lenz's Law. A loop of wire is generally energized by a direct current. At some time (t0) the current is cut off as quickly as possible. Faraday's law dictates that a nearly identical current is induced in the subsurface to preserve the magnetic field produced by the original current (eddy currents). Due to ohmic losses, the induced surface currents dissipate—this causes a change in the magnetic field, which induces subsequent eddy currents. The net result is a downward and outward diffusion of currents in the subsurface which appear as an expanding smoke ring when the current density is contoured.
I sat outside your house today
Just thinkin' you'll never learn
It's like the time I packed your things
And dropped 'em off where you were
I know you love to wash your car
So I left it in the lake
They say the strongest part of love is called hate
(Do you feel like I should)
Sit around with your touch
And your smell on my couch
And your hair in my brush
I loved you too much
(Do you think that I should)
Move along, change my phone
Get it on, I'll be gone
Treat him wrong 'til the day
That someone loves me the same way
How am I supposed to feel?
What exactly should I do?
I know you're no good for me
Yet and still I'm lovin' you
I'm must cite these lonely nights
Beggin' you to do me right
This time I just don't know
Heart says stay, mind says go
I knew I heard it in your voice
Something was wrong with our date
I feel I didn't have the choice
My heart was not in the way
Found out that I'm up in the cut
Some chick was wearing my face
You're lucky I'm in a good mood
Or she'll lay
Do you know how it feels
Sittin' 'round, smellin' sheets
Feelin' down, watchin' Heat
But my friends where you been
I'm with her again
Do you think that it's cool
To rock the fool in my house
I put you out, you come back in
We fight again, nobody wins
And baby, you should know that this is it
How am I supposed to feel?
What exactly should I do?
I know you're no good for me
Yet and still I'm lovin' you
I'm must cite these lonely nights
Beggin' you to do me right
This time I just don't know
Heart says stay, mind says go
How am I supposed to feel?
What exactly should I do?
I know you're no good for me
Yet and still I'm lovin' you
I'm must cite these lonely nights
Beggin' you to do me right
This time I just don't know
Heart says stay, mind says go
Oh oh oh oh
Hey, ooh, yeah
Ooh ooh, ooh ooh
Sometimes you can't let go
Even when your heart says so
I have to let you see
Your love will never be
?? with me you see
Can't let you, just don't need
I tried to love you still
I now know how it feels
How am I supposed to feel?
What exactly should I do?
I know you're no good for me
Yet and still I'm lovin' you
I'm must cite these lonely nights
Beggin' you to do me right
This time I just don't know
Heart says stay, mind says go
How am I supposed to feel?
What exactly should I do?
I know you're no good for me
Yet and still I'm lovin' you
I'm must cite these lonely nights
Beggin' you to do me right
This time I just don't know
Heart says stay, mind says go
How am I supposed to feel?
(It says go, go, go)
I know you're no good for me)
(Go go, go go)
I must cite these lonely nights
(Beggin' you to do me right)
This time I just don't know
Heart says stay, mind says go
How am I supposed to feel?
What exactly should I do?
I know you're no good for me
Yet and still I'm lovin' you
I'm must cite these lonely nights
Beggin' you to do me right
This time I just don't know