# Slapping the water

1. Oct 25, 2005

### kingofingo

I Came up with that yesterday when i had a shower. So here it is.
Imagine a fount(i am that the word for the found that throw water under us)
in a shower that has a hole on the one side and hang on an ax that is set on the wall(inside the shower). The fount can turn easily right and left. So we make the fount to throw water under pressure. Now, we slap the waterfall with our hand. Is it possible debends the pressure of the waterfall to MOVE the fount slapping the water??Sorry for my terrible english.

2. Oct 25, 2005

### Danger

If I understand the question correctly, the answer is no. The water doesn't provide a rigid transfer of force back to the spout.

3. Oct 26, 2005

### Mk

If I understand the question correctly, the answer is no. The water isn't solid enough to transfer force up or down to the fount.

4. Oct 26, 2005

### Tide

If the water stream hasn't broken apart then it can support waves which may impart momentum to the fountain.

5. Oct 26, 2005

### Danger

But wouldn't that be dependent upon it being a very high-density stream? Most fountains deliver a low-velocity, low-density stream. Smacking it with something will just disrupt the upward flow, not transfer momentum to the nozzle.

6. Oct 26, 2005

### Tide

The condition that the stream hasn't already broken apart is fairly stringent and any wave propagation up the stream (essentially supported by surface tension) will be minimal since even moderate amplitude will itself cause the stream to break up!

7. Oct 26, 2005

### kingofingo

Thanks a lot for your respond.
Is impossible to effect the fount?

8. Oct 26, 2005

### Tide

I am saying it may be possible but any effect would be extremely weak.

9. Oct 26, 2005

### Danger

If you freeze the stream, on the other hand...

10. Oct 26, 2005

### Tide

... in which case it won't flow very fast! :)

11. Oct 26, 2005

### Danger

Dang! You've got an answer for everything.:tongue:

12. Oct 26, 2005

### Mk

Glaciers flow. Kind of...

13. Oct 26, 2005

### Tide

But you make it so EASY!

14. Oct 26, 2005

### Danger

Looks like the beginning of a beautiful war.:tongue:
I'll catch you in GD when I'm not so tired.