Why are there shadows in electron microscopy? How are they different from shadows due to the absence of light? |
- Why are there shadows in electron microscopy? How are they different from shadows due to the absence of light?
- If a meteorite of a similar size to the one the wiped out the dinosaurs hit an ocean instead of solid ground would it be better, worse or no different for us?
- Why is exponential decay/growth so common? What is so significant about the number e?
- What evolutionary benefits are there to having both male and female organisms, rather than one type of organism who can reproduce independently?
- If two identical nuclear weapons were detonated at the same location, would the yield be exactly double? Would there be losses in power? Would the fireball radius be larger than if it were just one weapon?
- Why are dendrites 2-dimensional, rather than 3-dimensional?
- Did people in the past visibly age faster than people now?
- [Physics] Are center of mass and center of gravity always at the same point? What are some scenarios where they wouldn't be?
- Do antibiotics affect the effect of vaccines?
- If the purest white reflects all light, why isn't it a mirror?
- Are there any elements that have different properties in the vacuum of space compared to Earth's atmosphere?
- Is there a real chemical reason that people can be depressed?
- How does placing a wooden spoon over a pot of water prevent it boiling over?
- Why do stars appear to shimmer and twinkle while the sun has a steady brightness?
- would a parachute being dragged in space open up due to inertia (If it were being accelerated at its base)?
- What is happening when a person is anemic?
- Is there a mental bias which is the opposite of the Bandwagon Effect ?
- Are there numbers that give decimals when square rooted but don't continue forever?
- Why can all square numbers be rearranged to look like triangles?
- Is potential energy a real "thing" that exists or is it a made up number or thing that helps us explain kinetic energy?
- What is the difference between tokamaks and stellarators, and why is the latter so 'twisty'?
| Posted: 08 Nov 2015 01:51 AM PST I just watched this gif of a moving drill recorded with an electron microscope and noticed that there are both shadows and gloss where you'd expect them if it was made with a regular light capturing camera. Are these effects identical with shadows and gloss due to light (or the lack thereof) and if not, how are they different? Are there any differences in size, strength, specularity etc.? Is there an effect similar to iridescence? Or is this part of post-processing? In my research field, there are several examples of scientifical visualisations that create faux shadows in order to simulate spatiality, but to the best of my knowledge, electron microscopy isn't one of these technologies. [link] [23 comments]  |
| Posted: 08 Nov 2015 01:51 AM PST |
| Why is exponential decay/growth so common? What is so significant about the number e? Posted: 07 Nov 2015 08:24 AM PST I keep seeing the number e and the exponence function pop up in my studies and was wondering why that is. [link] [289 comments]  |
| Posted: 07 Nov 2015 09:49 AM PST |
| Posted: 07 Nov 2015 09:39 PM PST |
| Why are dendrites 2-dimensional, rather than 3-dimensional? Posted: 07 Nov 2015 09:08 AM PST I'm studying dendrites formed by electrodeposition of zinc in an alkaline solution, but this could probably apply to dendrites formed in a binary alloy solidification process just as easily. Why do dendrites typically have a flat, tapering, 2-dimensional shape (leaf-like) rather than a conical, tapering, 3-dimensional shape (pine cone-like)? You'd expect the side-branches of the dendrite to grow in every direction where material is available, but instead they tend to grow only in a single 2-D plane. [link] [11 comments]  |
| Did people in the past visibly age faster than people now? Posted: 07 Nov 2015 09:10 AM PST I know that life expectancy has increased over time, and from what I've heard for eons making it to 30 was 'pretty old'. But would a 30 y/o from the present look like a 30 y/o from the bronze age? I figure that during the past century or two, people have had access to mirrors, relatively healthy and consistently available food, tools to aid transportation, labour, and other strains on the body - generally we've been able to lead increasingly easier lives and become more aware of our appearances. Because life was so much harder for people thousands of years ago, would they have visibly aged faster? Edit: Excellent answer re. effects of the sun on skin here from u/mionendy! Any ideas if greying hair has changed over time? [link] [25 comments]  |
| Posted: 07 Nov 2015 10:34 PM PST Yesterday during my AP Physics class, we were taking notes on some slides and one of the slides said "center of mass and center of gravity are usually at the same point." I asked my teacher when they wouldn't be at the same point, because the slide said "usually," and he couldn't think of a situation on the spot. Could you guys come up w some stuff? [link] [2 comments]  |
| Do antibiotics affect the effect of vaccines? Posted: 08 Nov 2015 12:20 AM PST |
| If the purest white reflects all light, why isn't it a mirror? Posted: 07 Nov 2015 10:30 AM PST This sounds like a joke because of the way it's worded, but it's not. [link] [17 comments]  |
| Posted: 08 Nov 2015 01:46 AM PST |
| Is there a real chemical reason that people can be depressed? Posted: 07 Nov 2015 10:55 PM PST Is there an actual chemical balance that we can trace and cure depression with? [link] [7 comments]  |
| How does placing a wooden spoon over a pot of water prevent it boiling over? Posted: 07 Nov 2015 07:02 PM PST |
| Why do stars appear to shimmer and twinkle while the sun has a steady brightness? Posted: 08 Nov 2015 01:13 AM PST |
| Posted: 07 Nov 2015 10:51 PM PST So if a parachute is open but bunched up, and the tether to it started accelerating, would the parachute open up, even without any air resistance? I am assuming it would because the rope is connected to the outside perimeter of the chute, so the center would trail the rest of it, effectively opening it up. But I don't think it would really completely spread out like it would on earth, no idea what shape it would make. I hope that question/explanation made sense. [link] [3 comments]  |
| What is happening when a person is anemic? Posted: 08 Nov 2015 06:16 AM PST I few years ago I spent two days in the hospital with malaria. I was throwing up and feeling weak so I went to urgent care. My hemoglobin had dropped to just 6.1 gm/dL (I was a 24M). The doctor was shocked that I was even walking and got me into a hospital bed as fast as possible. Anyway, what was actually happening to my body because of that low level of hemoglobin? [link] [1 comment]  |
| Is there a mental bias which is the opposite of the Bandwagon Effect ? Posted: 07 Nov 2015 05:01 AM PST I'm asking this because I have this friend on facebook who seems to always think the opposite of popular belief, even if it makes no sense. I started to look into mental biases and I was wondering if it was one. Thanks [link] [32 comments]  |
| Are there numbers that give decimals when square rooted but don't continue forever? Posted: 08 Nov 2015 05:23 AM PST |
| Why can all square numbers be rearranged to look like triangles? Posted: 07 Nov 2015 04:19 PM PST I noticed this weird pattern when I was doodling on some graph paper. Every square number can also be rearranged into a pyramid shape of the exact same height. Why is this? Sorry, I know this is probably a really simple, stupid question but I don't know much abut math and this seems like an interesting pattern. [link] [9 comments]  |
| Posted: 07 Nov 2015 12:52 PM PST Im asking if potential energy exists "somewhere" or if it is something manifested by humans. (Like color) [link] [26 comments]  |
| What is the difference between tokamaks and stellarators, and why is the latter so 'twisty'? Posted: 07 Nov 2015 07:26 PM PST |
| You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now. | Email delivery powered by Google |
| Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States | |
No comments:
Post a Comment