Does the concept of Altitude exist in space? |
- Does the concept of Altitude exist in space?
- AskScience AMA Series: We are scientists who study how songbirds learn to sing, ask us anything!
- How fast do earthquake waves travel?
- When did Neanderthals leave Africa vs earliest humans?
- How does one “control for age, income, “ etc in a study? What does someone need to do with the data?
- Does Einstein's equation m=e/c squared not violate the conservation of mass?
- How do galaxies stay together/what’s holding them together?
- How do deciduous trees know when to drop their leaves? What would happen to them if winter never came?
- Why does a long balloon, if partially inflated, sometimes inflate in sections instead of inflating the whole balloon?
- If you pushed a balloon far enough underwater would the air inside compress to a density where the bouyant forces neutralise?
- Do animals in the wild suffer from constipation?
- How does shaving cream actually work?
- How do antennas transmit electromagnetic waves, and how do those waves propagate?
- Can a person sense light if he/she is asleep?
- How is it possible that negative heat capacities exist, and what do they mean physically?
- Water supply on islands without freshwater lens?
- On the molecular level, what is a fold/crease and why do they seem to have a "memory"? (E.g. folded Paper/Fabric)
- How are some medications multipurpose? For example how can one medicine function as an antidepressant in some doses or a sleeping aid in others (Example Amitriptyline)?
- Did plants cross the Bering straight?
- How can light be always at a constant speed but still be influenced by gravity?
- In all the observable universe, are there any astronomic objects moving at significant fractions of the speed of light?
- Can a difference in air pressure change amplitude of sound?
| Does the concept of Altitude exist in space? Posted: 15 Oct 2019 01:49 AM PDT Is there an "above" or "below" in space or do all objects exist on the same plane? To be more precise, does the equator of all objects exist on the same plane? Edit: Thank you for the Gold, wonderful stranger. It's my first. [link] [comments]  |
| AskScience AMA Series: We are scientists who study how songbirds learn to sing, ask us anything! Posted: 15 Oct 2019 04:00 AM PDT We are scientists who study how songbirds learn to sing, and we recently published a study in which we incepted memories of songs into birds using a technique called optogenetics. This led the birds to learn a song that we programmed but that they never actually heard. This paper has been receiving quite a lot of attention and we would love to address people's questions about this technique and the paper's implications. Here is the paper: https://science.sciencemag.org/content/366/6461/83. Joining us today are Dr. Maaya Ikeda, Therese Koch, Harshida Pancholi, and Dr. Massimo Trusel. They will be available from 3:00-5:00pm CDT (4-6 ET, 20-22 UT), ask them anything! [link] [comments]  |
| How fast do earthquake waves travel? Posted: 15 Oct 2019 09:00 AM PDT |
| When did Neanderthals leave Africa vs earliest humans? Posted: 15 Oct 2019 10:42 AM PDT I cant find a straight answer to this. All I find is 200,000 years ago but not separate times for each. Neanderthals had to have left Africa before homo sapiens as people of purely African descent have no Neanderthal DNA, only Europeans and Asian and those who are descendants of them. [link] [comments]  |
| How does one “control for age, income, “ etc in a study? What does someone need to do with the data? Posted: 15 Oct 2019 04:44 AM PDT |
| Does Einstein's equation m=e/c squared not violate the conservation of mass? Posted: 15 Oct 2019 09:20 AM PDT Does energy like gravitational potential energy really add mass to the object? [link] [comments]  |
| How do galaxies stay together/what’s holding them together? Posted: 15 Oct 2019 06:28 AM PDT |
| Posted: 14 Oct 2019 08:56 PM PDT Obviously temperature is super important to this process, but what actual patterns trigger dormancy, and how can these get messed up? [link] [comments]  |
| Posted: 14 Oct 2019 05:42 PM PDT What keeps the pressured air from inflating the parts of the balloon that is not inflated and stay where the pressure is highest? [link] [comments]  |
| Posted: 14 Oct 2019 09:40 PM PDT |
| Do animals in the wild suffer from constipation? Posted: 14 Oct 2019 05:01 PM PDT |
| How does shaving cream actually work? Posted: 14 Oct 2019 11:19 PM PDT I've been usig it for a bout a year and still have no idea. [link] [comments]  |
| How do antennas transmit electromagnetic waves, and how do those waves propagate? Posted: 14 Oct 2019 09:41 PM PDT I'm currently doing a communications course and we are up to antennas. There are a few things my teacher has covered which don't seem to add up and he isn't very clear when I ask him to clarify. Firstly, Standing Waves: He began by saying that standing waves occur when the line is not terminated correctly, then went on to say that standing waves are what create the electromagnetic wave that propagates out with the signal. Question: how are the waves produced and what is their relationship with the standing wave? Secondly, Propagation: Every time he brings up the propagation, he says that a wave cycle in the signal creates a new wave front which pushes out the previous wave front, and then it travels at the speed of light. Question: If EMF is self-propagating, which is how I understand that these waves work, why is he saying that the wave fronts are being pushed away by the following wave front that is produced by the signal from the transmitter? These questions may be quite specific, but his explanations of the operation of transmitting antennas has only confused me about what I thought I knew, and I need some clarification. Thank you greatly! [link] [comments]  |
| Can a person sense light if he/she is asleep? Posted: 15 Oct 2019 01:20 AM PDT Hypothetically say, they lack an eyelid and fell asleep and don't get disturbed, will they still be able to sense light ? [link] [comments]  |
| How is it possible that negative heat capacities exist, and what do they mean physically? Posted: 14 Oct 2019 03:20 PM PDT Specifically, I saw a negative molar heat capacity under constant pressure for pyrite or something similar. That strikes me as unintuitive, but unless the numbers on my hw were made up, it's accurate. How can that be? [link] [comments]  |
| Water supply on islands without freshwater lens? Posted: 15 Oct 2019 02:02 AM PDT How does the water supply on islands without freshwater lens work? Is the complete need covered by rain and supplied water? [link] [comments]  |
| Posted: 14 Oct 2019 01:49 PM PDT An example would be if you fold a shirt and then wear the shirt. You can sometimes see the lines where it was folded. Another example would be folding paper. Once folded, it never really retains the same form once flattened again. [link] [comments]  |
| Posted: 14 Oct 2019 04:32 PM PDT Are they somehow related? What is it about different doses that changes the mode of operation on the body? [link] [comments]  |
| Did plants cross the Bering straight? Posted: 14 Oct 2019 03:24 PM PDT |
| How can light be always at a constant speed but still be influenced by gravity? Posted: 14 Oct 2019 08:07 AM PDT Lets take a black hole for example. The gravitational pull is so large that not even the speed of light is a sufficient escape velocity. But wouldn't that mean that light escaping from gravitational pulls is slowed down? That in theory a gravitational body with the same escape velocity as the speed of light would make light "stand still"? [link] [comments]  |
| Posted: 14 Oct 2019 06:29 AM PDT |
| Can a difference in air pressure change amplitude of sound? Posted: 14 Oct 2019 08:24 AM PDT Or is a sound from Mt. Everest and somewhere below sea level the exact same? I was thinking if there's more air, the sound gets weaker because there's more air to push, but at the same time, more air is being pushed to the receiver. Does anyone know? [link] [comments]  |
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