Timeline for Could one fire a bullet with sufficient speed to leave the Earth?
Current License: CC BY-SA 3.0
12 events
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| Jul 14, 2023 at 21:47 | vote | accept | Simon S | ||
| Jun 19, 2015 at 19:11 | comment | added | Mike Dunlavey | Sure it's possible. All you have to do is have a gun barrel tall enough reach above most of the atmosphere, and fill it with near-vacuum. Another way: make sure your bullet is skinny and tall, to reach above most of the atmosphere. Either way, you use a big-enough propellant and a long-enough barrel. | |
| Jun 16, 2015 at 20:13 | comment | added | Helder Velez | 12 m of water is noting but with $K_E=\ m\cdot\ v^2/2$, that squared v will blow everything apart. | |
| Jun 16, 2015 at 19:57 | history | edited | Simon S | CC BY-SA 3.0 |
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| Jun 16, 2015 at 19:32 | history | edited | Qmechanic♦ |
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| Jun 16, 2015 at 18:35 | answer | added | WhatRoughBeast | timeline score: 2 | |
| Jun 16, 2015 at 18:33 | comment | added | CuriousOne | @WhatRoughBeast: It's just a very rough estimate for the back of the envelope. The average height of the atmosphere is about 8km and the density is about 1.5kg/m^3. I just didn't care to look up the exact numbers. | |
| Jun 16, 2015 at 18:31 | comment | added | WhatRoughBeast | @CuriousOne - 12 meters? Reference, please? | |
| Jun 16, 2015 at 17:18 | history | edited | Simon S | CC BY-SA 3.0 |
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| Jun 16, 2015 at 17:14 | comment | added | CuriousOne | Yes, you could shoot a bullet trough the atmosphere without it burning up. The total mass that needs to be penetrated is equivalent to about 12m of water, which requires a sufficiently dense projectile with a multiple of that mass per area. | |
| Jun 16, 2015 at 17:14 | comment | added | John Rennie | Related What is the possibility of a railgun assisted orbital launch?. | |
| Jun 16, 2015 at 16:58 | history | asked | Simon S | CC BY-SA 3.0 |