# I Acceleration of a gas into a vacuum

1. Jul 26, 2017

### Ron Spencer

Set up: Gas on one side of a divider and an infinite vacuum on the other.

Question: When you remove the divider, over time, does the gas increase in acceleration, does it peak and then decrease or does it remain the same as the gas enters the vacuum/ leaves the side opposite the vacuum?f

Thanks

2. Jul 26, 2017

### Staff: Mentor

What are your thoughts on this?

3. Jul 26, 2017

Staff Emeritus
What does this mean?

4. Jul 26, 2017

### Ron Spencer

What I meant was, does the flow of gas into the vacuum go faster, stay the same or slow down over the time it takes for it to flow into the vacuum. I hope that is clear. If not, please let me know and I'll try again.

5. Jul 26, 2017

### Ron Spencer

Well....its been a long, long time since I studied physics in college and frankly, I don't remember much theory. Within those parameters my thought is that, as the amount of gas in that chamber decreases I'd expect the speed that it flows into the vacuum to slow.

On the other hand, the "pull" of the vacuum, while slightly reduced by the introduction of the gas (slightly reducing the quality of the vacuum), will continue unchanged. If this is true then the speed of the gas leaving its chamber should remain constant. As you can see, I am torn on which is the correct analysis.