What types of signals do bees release under distress or after death? |
- What types of signals do bees release under distress or after death?
- What determines how long a rumble of thunder will last?
- Could sand be considered a fluid?
- When a rechargable battery is made, does it start out at full charge or no charge?
- How do animals know that they should perform certain behaviours, even if never shown by their parents/peers?
- Why doesn't a moving massive object within a black hole's event horizon affect the gravitational force of the black hole (including said object) felt by observers outside the event horizon?
- What impacts the speed at which lava flows on land other than gravity?
- Why do some foods go bad, but others go stale?
- Will the Physics change after superconductors?
- Does everything become solid?
- Why are fighter jets so much louder than passenger jets?
- Is there a favoured hypothesis regarding increased mortality rates and anxiolytics?
- Does woodwind instruments change pitch when played at different atmospheric pressures?
- Can objects that pass inside of an event horizon go into orbit around the singularity?
- Are there any techniques on collecting Anti-matter?
| What types of signals do bees release under distress or after death? Posted: 18 Jun 2018 10:01 PM PDT Today I opened the window to my apartment for about 3 minutes. One bee got in, so I closed the window. The one that got in continuous made buzzing noises and hitting the glass window to get out, it died within 2-3 minutes. One minute later there's about 10 bees slamming into my window trying to get in. Did the trapped bee release some sort of stress signal that I can't observe? [link] [comments]  |
| What determines how long a rumble of thunder will last? Posted: 18 Jun 2018 06:32 PM PDT |
| Could sand be considered a fluid? Posted: 19 Jun 2018 12:27 AM PDT Fluid is a state where the body can easily change it's shape with little force applied, it takes a shape of the vessel it is put in. Sand on a macro scale ( so thousands/millions of grains rather then a single few) also has those qualities. As such can it be considered a fluid? Of not can a powdrr with smaller grain size be considered a fluid? Where is the boundary ? [link] [comments]  |
| When a rechargable battery is made, does it start out at full charge or no charge? Posted: 18 Jun 2018 08:09 PM PDT |
| Posted: 18 Jun 2018 11:21 PM PDT For example, my rabbit was kept in a hutch from birth separated from the mother. And as soon as I took her home and allowed her to run in my backyard under supervision, the very first thing she did was start digging a burrow. How did she know to do that? She had never, ever been shown to do that by any other rabbit. [link] [comments]  |
| Posted: 18 Jun 2018 12:48 PM PDT Consider Alice, drifting just outside the event horizon, and Bob, located 1 meter away, just inside the event horizon. As Bob starts drifting towards the center of the black hole, the distance between him and Alice increases and one would think that the gravitational force experienced by Alice (caused by Bob and the black hole) should decrease. But obviously this can't be the case since no information can escape the event horizon. But how should one think in order to understand this? Is there even a simple way to describe why this cannot be so? A related question: does the gravitational force of a black hole behave as if all mass contained within the event horizon was located at the center of the black hole? [link] [comments]  |
| What impacts the speed at which lava flows on land other than gravity? Posted: 18 Jun 2018 10:14 PM PDT Video example: https://www.youtube.com/watch?v=gnrg3cfDfrY I have never seen anything like this and it seems completely impossible. All video I can find of lava flow is extremely slow when not falling down a steep pitch. [link] [comments]  |
| Why do some foods go bad, but others go stale? Posted: 18 Jun 2018 07:21 PM PDT You can have a bag of chips open for a month and eat out of it. You won't get sick but it may go stale. You can leave a raw potato out for a week and it will be just fine, but the moment you cook it, it spoils when you don't refrigerate it. Why do some foods spoil but others are seemingly fine? [link] [comments]  |
| Will the Physics change after superconductors? Posted: 18 Jun 2018 08:59 PM PDT Super conductors are the conductors wilth "ZERO" resistance. If I was attentive in my 9th grade I remember that every object has a resistance to offer. In this case of what I have researched and understood is that the super conductors will provide a energy which will never end. If explained in simple way if powered once the electrons present will be powered and if there's no resistance it will never loose it's energy (meaning having indefinite energy supply) and will revolutionised our ordinary day. Now if I remember my 8th grade, I had a sentence stating that Energy can't be created nor destroyed. I cannot understand how the super conductors have Zero Resistance and provide indefinite energy. Now the main question is if we get to control the super conductor and use it in daily life, many fundamental laws as the law of conversation of energy, Newton's laws, etc, will get Disturbed. Need your opinions [link] [comments]  |
| Posted: 18 Jun 2018 01:19 PM PDT If cooling something down really reduces the kinetic energy of the particles, thus changing the state of matter from (plasma), gas to liquid, to solid- shouldn't everything, gasses included, turn to a solid at absolute zero? If so, how would a solid oxygen look like? If not, why so? [link] [comments]  |
| Why are fighter jets so much louder than passenger jets? Posted: 18 Jun 2018 12:23 PM PDT |
| Is there a favoured hypothesis regarding increased mortality rates and anxiolytics? Posted: 18 Jun 2018 02:29 PM PDT According to a number of articles I've read on the NCBI site, anxiolytic and hypnotic drugs have a notable correlation with increased mortality (apparently even after correcting for confounding factors). Is this accepted as a likely causal link, and is there a favoured hypothesis as to what the specific cause might be? It seems strange/concerning that an entire category of drugs, some of which aren't chemically similar, has this correlation with increased mortality. [link] [comments]  |
| Does woodwind instruments change pitch when played at different atmospheric pressures? Posted: 18 Jun 2018 03:52 AM PDT Woodwind instruments produce pitch by having a standing wave in the air of a tube. Would changing the pressure (or the type of gas) in the tube change the frequency of the standing wave? [link] [comments]  |
| Can objects that pass inside of an event horizon go into orbit around the singularity? Posted: 18 Jun 2018 05:38 PM PDT |
| Are there any techniques on collecting Anti-matter? Posted: 18 Jun 2018 10:14 AM PDT Has there ever been a collection of anti-matter done, or has anti-matter when ever produced/collected been just one or two particles at a time? [link] [comments]  |
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