Are there any other animals known to "work out", or do an activity for the sole purpose of muscle growth? |
- Are there any other animals known to "work out", or do an activity for the sole purpose of muscle growth?
- How is the analog signal from a HDD read head processed before it is digitized?
- On an infinite square grid of perfect one Ohm resistors, what is the equivalent resistance between two points that are a knight's move from each other?
- How does the internal body maintain a temp of 37 (98.6F) degrees Celsius without difficult yet any temperature over, say, ~26 (~80F) degrees Celsius is seemingly hot and causes a sweat (cooling) response in most, despite the internal temperature being much higher?
- How can scientists measure the electron affinity and the ionization energy of an element?
- What adaptations would reef organisms have had to survive past climate conditions (e.g., in the Cretaceous) when atmospheric carbon dioxide levels were much higher than they are today?
- How does gravity shift wavelength for light emitted at non-radial directions and for observers located at finite distance?
- How does the VASIMR rocket engine not destroy itself?
- Scientist are capable of artificially creating temperatures of near 0k, how are these temperatures measured?
- How do submarines cause cavitation on their bodies/propellers and what exactly does it do to the metal?
- How does laser strength fall off with distance?
- [Computer Eyestrain] Is there a difference between using a blue-light filtering software on the computer, and tinted computer eyeglasses that claim to do the same, assuming the screen is non-reflective matte?
- If the boiling point of water is 100°C, why is gaseous water present in the air at room temperature (~26°C)?
- How does using an attenuated/inactivated vaccine with someone infected with rabies help?
- How come crocodiles were able to survive the K-T extinction event but no land-based dinosaurs were?
- How did we go from unicellular to multicellular life?
- Is fat burned during or after exercise?
- Euler's identity in non-euclidean euclidean geometry?
- How do we know that The Speed of Light is the speed limit of the universe?
| Posted: 01 Jul 2017 03:06 PM PDT |
| How is the analog signal from a HDD read head processed before it is digitized? Posted: 01 Jul 2017 08:38 AM PDT Doing a simple estimation, a hard drive might be able to read 128 MB/s. Maybe it has 4 platters, giving each read head a reading speed of 32 MB/s, or 256 Mbit/sec. So this would be a 256 MHz signal coming from the read head, but of course it's not a clean digital signal. Some of the magnetic domains might have lost some of their alignment making their signal weaker, and in any case everything would bleed together a bit, right? What does the signal from the read head look like, and how is it processed to become digitized? Furthermore, how does the HDD even know where the read head is in terms of the circumference of the platter? [link] [comments]  |
| Posted: 01 Jul 2017 02:46 PM PDT I've been reading XKCD for years at this point, and I like looking into things that appear in the comics. What is the resistance here, how would you work it out, and why is it so incredibly hard? [link] [comments]  |
| Posted: 01 Jul 2017 11:39 AM PDT |
| How can scientists measure the electron affinity and the ionization energy of an element? Posted: 02 Jul 2017 02:14 AM PDT I am pretty curious about the method that the scientists use to measure the electron affinity and the ionization energy of an element. If someone knows about it, please tell me. [link] [comments]  |
| Posted: 02 Jul 2017 05:16 AM PDT Considering the concerns regarding the impact of ocean acidification on the abilities of organisms that build calcium carbonate skeletons, I have often wondered what adaptations might such organisms have had in the distant past when atmospheric CO2 was considerably higher than it is today? Are there living species that are largely unaffected by such effects? [link] [comments]  |
| Posted: 01 Jul 2017 08:10 PM PDT The only equations I could find for gravitational redshift assumed that light was emitted radially, directly outward from the mass and that the observer was located infinitely far away from it and any other masses. How would this change if the light was emitted at a different angle or if the observer was still within the mass's gravitational field? [link] [comments]  |
| How does the VASIMR rocket engine not destroy itself? Posted: 01 Jul 2017 10:22 PM PDT http://www.adastrarocket.com/aarc/VASIMR This engine may power our spacecraft one day, and I understand the gist of it except for this: "ICH is a technique used in fusion experiments to heat plasma to temperatures on the order of those in the Sun's core (10 million K)". The Museum of Flight, where I learned about the engine today, said something similar. How can heat of that incredible magnitude be produced in any machine without destroying it in an inferno? Are there materials or construction methods that could actually withstand such temperatures? [link] [comments]  |
| Posted: 01 Jul 2017 05:57 PM PDT |
| Posted: 01 Jul 2017 10:46 PM PDT I'm trying to get an in-depth but idiot-readable explanation of Cavitation What causes it, what it does and how it affects life underwater in a submarine So I can help the developers of the game Subnautica understand cavitation and therefore fix their game [link] [comments]  |
| How does laser strength fall off with distance? Posted: 01 Jul 2017 11:02 AM PDT Normally, light follows the inverse square law when it comes to intensity, but lasers are very concentrated so it takes a longer time for this law to take significant effect. What I want to know is when/where this transition is and how the signal strength can be modeled before and after it. [link] [comments]  |
| Posted: 01 Jul 2017 12:10 PM PDT |
| Posted: 01 Jul 2017 05:41 AM PDT Question says it all. If the temperature at which water becomes a gas at 100°C, how is it possible that it is still in a gaseous state at room temperature and it doesn't just condense in the air? [link] [comments]  |
| How does using an attenuated/inactivated vaccine with someone infected with rabies help? Posted: 01 Jul 2017 05:43 AM PDT I understand these vaccines will familiarise the immune system with the virus and therefore cause a quick immune response the next time the person is infected, but if the person has already been infected, won't the vaccine just have the same effect on the immune system as the actual infection? Wouldn't it make more sense to inject them with antibodies? [link] [comments]  |
| How come crocodiles were able to survive the K-T extinction event but no land-based dinosaurs were? Posted: 01 Jul 2017 06:57 AM PDT |
| How did we go from unicellular to multicellular life? Posted: 30 Jun 2017 10:45 PM PDT |
| Is fat burned during or after exercise? Posted: 30 Jun 2017 11:34 PM PDT I know excersizing burns fat, but does it occur while you're excersizing or does it take place afterwards? [link] [comments]  |
| Euler's identity in non-euclidean euclidean geometry? Posted: 01 Jul 2017 03:46 PM PDT What happens with Euler's identity in non-euclidean geometry? [link] [comments]  |
| How do we know that The Speed of Light is the speed limit of the universe? Posted: 01 Jul 2017 08:37 AM PDT |
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