Vacuum, atmospheric pressure and constant gravitational acceleration

  • Thread starter Introyble
  • Start date
  • #1
33
0
This isn't home work, just a curiousity question and I'm obviously under qualified to find the answer.

Looking to approximate how the amount of of vacuum in inches of Hg negate the affects of atmospheric pressure in regards to acceleration.

We all remember when David Scott let loose the hammer and feather.

Let's say we have a quantitive amount of vacuum pressure, how may we approximate the rate of gravitational acceleration on objects with known mass?

For example: Given a particle with a mass of 35 lbs/ft3 (or 721 kg/m3). Happens to be coal ash. What is the given approach to gravity (acceleration) at 10(-1) in/hg of vacuum. 10(-2).....10(-3).

My goal is to approximate the percentage of gain per inch of Hg on particles of low density.

Please, the more rudimentary your answer the better lol.
 
Last edited:

Answers and Replies

  • #2
21,278
4,727
The reason for the difference in the experiments is air drag. So that is the key factor that has been omitted from your assessment. Go back and analyze it properly including air drag.
 

Related Threads on Vacuum, atmospheric pressure and constant gravitational acceleration

Replies
3
Views
5K
Replies
20
Views
16K
Replies
1
Views
2K
  • Last Post
Replies
6
Views
822
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
5
Views
13K
  • Last Post
Replies
17
Views
10K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
15
Views
1K
Top