# Homework Help: Parallel orientation lower in energy than antiparallel orientation

1. Jun 16, 2006

### asdf1

Why is the parallel orientation slightly lower in energy than the anitiparallel orientiation?

2. Jun 16, 2006

### Staff: Mentor

What is the context of your question?

3. Jun 16, 2006

### Gokul43201

Staff Emeritus
Because $-cos(0) < -cos(2\pi)$

4. Jun 17, 2006

### arunbg

Slight typo there Gokul, because $-cos(0) < -cos(\pi)$

5. Jun 18, 2006

### asdf1

thank you very much!

6. Jun 19, 2006

### Gokul43201

Staff Emeritus
Gah, yes of course.

However, the point I was trying to convey was that the question needed to be more specific for the answer to be meaningful.

7. Jun 29, 2006

### asdf1

ok~ sorry about that~

8. Jun 29, 2006

### HallsofIvy

Don't just say you are sorry- be more specific! What is the context of the question? What is it that is "parallel" or "anti-parallel" and what energy are you talking about?