# Homework Help: Elevation in height

1. Mar 9, 2016

### foo9008

1. The problem statement, all variables and given/known data
why z1=z2 ? isn't the position 2 is higher than position 1 ?

2. Relevant equations

3. The attempt at a solution

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2. Mar 9, 2016

### haruspex

The question is rather unclear, but I believe the diagram is the plan view, i.e. looking from above. (It doesn't say "45 degrees to the horizontal".)

3. Mar 10, 2016

### foo9008

the height of both are not the same, right??

4. Mar 10, 2016

### haruspex

No, I'm saying that the flow is all at the same horizontal level. Reread what I posted before.

5. Mar 10, 2016

### foo9008

if this is side view , the ther must be some value for z , right ? z cant be equal to 0 ?

6. Mar 10, 2016

### haruspex

but it isn't.

7. Mar 10, 2016

### foo9008

sorry , what do you mean ? i didnt get you

8. Mar 10, 2016

### haruspex

It's the plan view, i.e. you are looking down onto the pipe from above. The z direction is out of the page. The flow is all on one horizontal level.

9. Mar 10, 2016

### foo9008

if this is a side view , then z cant be = 0 , right ?

10. Mar 10, 2016

### haruspex

If it were a side view, that would be true.