# Vector Problem

1. Dec 11, 2016

### hubluh

1. The problem statement, all variables and given/known data
Find the value of ez if e = 1/3i + 2/3j + ezk

2. Relevant equations
Any help?

3. The attempt at a solution
Have no idea where to start

2. Dec 11, 2016

### Greg Bernhardt

3. Dec 11, 2016

### hubluh

Im currently studying for an exam and I found this in past papers. Im using no book atm.

4. Dec 12, 2016

### haruspex

My only guess is that e is supposed to be a unit vector. Any idea if that is right? If not, is it possible for you to upload an image of the question? You might be omitting a key detail which you do not realise is important.

5. Dec 12, 2016

### hubluh

This is the exact question :" The vector e=1/3i+2/3j+ezk is a unit vector. Find ez?"
The possible answers are 0,1,1/3 and 2/3

6. Dec 12, 2016

### PeroK

Do you know what a unit vector is?

7. Dec 12, 2016

### Elvis 123456789

Do you know what it means for a vector to have a unit length (i.e. to be a unit vector)?

8. Dec 12, 2016

### hubluh

Ahh I get you know. It has a magnitude of 1.
Thanks so much