Activity for user1256923
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Why do compasses develop bubbles? Please note I am not asking 'in what conditions some compasses can develop a bubble', what I am asking is, why can't manufacturers make liquid filled compasses that will not, ever, develop bubbles. If we take atmospheric pressure (i.e. 'altitude') as a cause of bubbles, I fail to see why a compass c... (more) |
— | almost 7 years ago |