A 5 foot section of railroad rail does not seem very flexible but a 200 foot section appears to be as flexible as a noodle with bends under a foot. How does longer length make it more flexible? |
- A 5 foot section of railroad rail does not seem very flexible but a 200 foot section appears to be as flexible as a noodle with bends under a foot. How does longer length make it more flexible?
- How are there lakes in the bottom of the ocean?
- Can Dogs Count?
- Which symmetry is related to the conservation of mass in classical mechanics?
- How can audio be sped up without increasing in pitch?
- Why does stuff get preserved in amber?
- What prevents the immune system from attacking useful bacterias in the intestines?
- What is the difference between effective nuclear charge and core nuclear charge?
- What is the meaning/mechanism behind IR drop in supercapacitors?
- Is there a "filter" that can shift infrared light into the visible spectrum?
- What determines an automatic weapon's rate of fire?
- Why are world maps drawn as if we were looking at the Earth from above and not from below?
- What causes interference noise while touching metal with unplugged headphone jack?
- Can somebody else listen to what I'm listening to if I'm using a bluetooth headset?
- What's the difference between Cocaine and Crack Cocaine, and what's a freebase?
- What type of noise does a hand held blow dryer produce?
- What is a food allergy and why can’t I “get use” to the food?
| Posted: 17 Dec 2017 08:49 PM PST |
| How are there lakes in the bottom of the ocean? Posted: 17 Dec 2017 11:00 AM PST |
| Posted: 18 Dec 2017 03:14 AM PST I was watching a video in which a labrador father is teaching his pups how to swim. Great content, very adorable. But at one point, they all run off leaving one slightly worried and confused pup behind. But after a few seconds (long enough for the daddy dog to realise) the rest of them come back to collect the lost puppy before taking off again. So does the daddy dog just know that one of his dogs is missing, or is he keeping track of how many he can see? Is this a visial, cognitive process of "Let's re-count the puppies so I know none of them are lost or in danger" or is it more instinctive than that? Thanks nerds. [link] [comments]  |
| Which symmetry is related to the conservation of mass in classical mechanics? Posted: 17 Dec 2017 04:43 PM PST According to Noether theorem every symmetry of a problem leads to a conservation of a quantity: Time evolution symmetry - Energy conservation Spatial translation sym- Momentum conservation Rotation - Angular momentum U(1) gauge - electric charge Even Galilean translation - Center of mass displacement conservation Which one is related to conservation of mass? I know it is not conserved in special relativity but Noether applies also to classical mechanics. [link] [comments]  |
| How can audio be sped up without increasing in pitch? Posted: 17 Dec 2017 01:53 PM PST For example, say that you increase the speed of a recording of a voice. Normally, the pitch of the voice would increase as the sound gets sped up, but some software allows you to increase the speed of an audio file while maintaining the pitch. What's the difference between these two functions regarding how the sound waves are behaving? [link] [comments]  |
| Why does stuff get preserved in amber? Posted: 17 Dec 2017 07:39 PM PST |
| What prevents the immune system from attacking useful bacterias in the intestines? Posted: 17 Dec 2017 08:43 AM PST |
| What is the difference between effective nuclear charge and core nuclear charge? Posted: 17 Dec 2017 07:50 PM PST |
| What is the meaning/mechanism behind IR drop in supercapacitors? Posted: 17 Dec 2017 06:25 PM PST When measuring internal resistance in a supercapacitor you use the IR drop, which is measured when the current direction is switched. What is the meaning of this voltage drop? Why is the voltage of the cell different depending on direction of current? [link] [comments]  |
| Is there a "filter" that can shift infrared light into the visible spectrum? Posted: 17 Dec 2017 10:19 AM PST As far as I know, night vision goggles that are based on IR use a camera and a display for this "conversion". Is there a different way to make the infrared visible? [link] [comments]  |
| What determines an automatic weapon's rate of fire? Posted: 17 Dec 2017 11:18 AM PST |
| Why are world maps drawn as if we were looking at the Earth from above and not from below? Posted: 17 Dec 2017 10:28 PM PST I thought it made sense because we have satellites but maps have been drawn like this since way before planes were invented. [link] [comments]  |
| What causes interference noise while touching metal with unplugged headphone jack? Posted: 17 Dec 2017 04:16 PM PST So yeaterday after putting on my in-ear headphones i accidentally touched a piece of metal and it made a interference noise. Just like the noise in the radio. Where does the energy come from to generate that noise and why metal. [link] [comments]  |
| Can somebody else listen to what I'm listening to if I'm using a bluetooth headset? Posted: 17 Dec 2017 05:34 PM PST With more and more phones ditching the 3.5 mm audio jack, it seems like we're headed into an age dominated by bluetooth earbuds and headsets. Is this a privacy concern? Can a 3rd party that wasn't present during the device pairing process come by and hijack the audio coming out of my phone (or worse)? [link] [comments]  |
| What's the difference between Cocaine and Crack Cocaine, and what's a freebase? Posted: 17 Dec 2017 03:03 PM PST |
| What type of noise does a hand held blow dryer produce? Posted: 17 Dec 2017 04:38 PM PST I know there are different names for different types of (mathematical) noise such as white, brown, pink noise etc. Is there one of those types that comes close to the noise profile that a blow dryer produces? [link] [comments]  |
| What is a food allergy and why can’t I “get use” to the food? Posted: 17 Dec 2017 02:22 AM PST I have peanut allergies and have countlessly eaten many foods containing peanuts, why doesn't my body just not respond to the peanuts? [link] [comments]  |
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