- The Pascal-B test during Operation Plumbbob famously launched a 2000 lb steel plate at such velocity that it was only visible for a single frame on the high-speed camera. Is this footage available to the public?
- How did it come to be that the botanical definition of a berry is so vastly different from the culinary one?
- At what point does the atmosphere get so thin that describing speeds in terms of 'mach' or relative to the speed of sound becomes pointless?
- If matter can neither be created nor destroyed, does this mean that every subatomic particle that comprises our bodies was around since the beginning of time? (Protons, neutrons, electrons, quarks, etc)
- Suppose I am using a laptop 24/7. Is it more power efficient to leave the laptop plugged in to power all the time, or to let it charge fully, drain the battery, recharge it and then repeat?
- Is there anything hotter than the sun?
- How do we know that earth is ~5 billion / universe is ~13.5 billion years old?
- Why is a sponge soft when wet but hard when dry?
- How do attractive forces work?
- How can a scanning tunneling microscope move the tip so precisely it is able to measure individual atoms?
- (Electricity) How does BlueTooth Technology work?
| Posted: 13 Jul 2017 06:17 PM PDT This event was mentioned in an AskReddit thread and people are asking for the footage, or at least a still image of the "single frame" in question. I thought I had seen it before, but now I can't find it. Maybe I imagined it? [link] [comments]  |
| Posted: 13 Jul 2017 08:31 PM PDT |
| Posted: 14 Jul 2017 03:24 AM PDT |
| Posted: 14 Jul 2017 12:00 AM PDT Furthermore, is it fair to say that these same subatomic particles could have been part of a previous human, animal, or environmental object (tree, dirt, etc.)? [link] [comments]  |
| Posted: 13 Jul 2017 10:28 AM PDT |
| Is there anything hotter than the sun? Posted: 13 Jul 2017 06:50 PM PDT |
| How do we know that earth is ~5 billion / universe is ~13.5 billion years old? Posted: 13 Jul 2017 12:31 PM PDT |
| Why is a sponge soft when wet but hard when dry? Posted: 13 Jul 2017 08:56 PM PDT Came to my mind when washing dishes and the more I think about it the more it seems like magic to me. [link] [comments]  |
| How do attractive forces work? Posted: 13 Jul 2017 09:12 AM PDT I understand (at least I think I do) how repulsive forces function at the quantum level, but I cannot find any explanation for attractive forces. Let's take the electromagnetic force, mediated by the photon. When two similarly charged particles come near each other, they exchange photons with each other and repel because of the change in momentum. How does this work for attractive forces? For oppositely charged particles the light cannot impart a negative momentum on them so what is happening here? [link] [comments]  |
| Posted: 13 Jul 2017 06:10 AM PDT The detector tip would have to move with subatomic precision and that seems impossible. [link] [comments]  |
| (Electricity) How does BlueTooth Technology work? Posted: 13 Jul 2017 03:15 PM PDT |
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