Is there a limit on how long a power cord can be? |
- Is there a limit on how long a power cord can be?
- I know it takes two weeks for the flu vaccine to be fully effective. I assume effectiveness is zero right before the vaccine is administered, and maximum after two weeks. But is there a graph that shows how effectiveness changes in time?
- Why the Antarctic ice cap stays in one place and does not drift freely like an iceberg?
- Why is the separation constant for the radial equation of the Hydrogen atom in the form of L(L+1)?
- Why can some viruses (smallpox, polio) be virtually eradicated while others cannot (HIV, influenza)?
- How does a coax splitter work?
- Is there a link between a metal being conductive from an electric standpoint and it being magnetic? If so, what is the cause?
- If the capacity of a battery charging another battery drops below that of the receiving battery, will it stop transferring electricity since the electrons will no longer prefer to leave the lower energy "state" of the drained battery?
- If our bodies are conductive, can holding a battery between two fingers deplete it completely?
- What can stop and/or destroy a black hole?
- How/why are so many mathematical proofs and theorems contingent on the Riemann hypothesis being true?
- Are there any ant species that don’t live in colonies?
- Do they update the voyager software?
- How did the Russian Woodpecker receiver work?
- What is meant by the heat death of the universe?
- Does language affect learning and studying?
- If the strength of an acid is based on concentration, why are acids like Sulfuric Acid always considered so dangerous compared to others?
- From what I have learnt so far, refrigerators use chlorofluorocarbons for cooling. Do these chlorofluorocarbons run out after some time? If yes how are they replenished?
- Microwave Ovens and Wi-Fi Signals Operate at The Same Frequency (2.4GHz). What Makes Microwave Ovens More Dangerous?
| Is there a limit on how long a power cord can be? Posted: 12 Dec 2017 01:44 AM PST Probably a stupid question, but I was joking around about ice frozen on the moon, and how we can melt it by using a hair drier with a super long cord. This got me thinking though… if there was a cord that long, there'd be a huge delay as the electricty travels up the wire. But then I thought even more… would the electricity even reach the hair drier? Is there a limit to how far electricity can travelalong a wire? I imagine some of the energy is lost when it has to travel. So, would a power cord to the moon even work? [link] [comments]  |
| Posted: 11 Dec 2017 12:40 PM PST Basically, I'm curious to know, for example, when is it 50% effective, or how soon does it get to 90%, etc. I'm sure data exists that could allow plotting that graph - I just could not find it myself. Thanks! [link] [comments]  |
| Why the Antarctic ice cap stays in one place and does not drift freely like an iceberg? Posted: 12 Dec 2017 12:35 AM PST Also, what is the size of the largest iceberg that can break off and drift away? Like, can the massive ice cap break in half and one half escapes? [link] [comments]  |
| Why is the separation constant for the radial equation of the Hydrogen atom in the form of L(L+1)? Posted: 11 Dec 2017 02:46 PM PST Hello everyone, I know that solving the Schrodinger equation for the Hydrogen atom requires separation of variables. When doing this, why are the separation constants of a particular form? E.g. the separation constant for the radial equation is l(l+1), rather than just, say, l. What is the reason for this? Thanks. [link] [comments]  |
| Why can some viruses (smallpox, polio) be virtually eradicated while others cannot (HIV, influenza)? Posted: 11 Dec 2017 08:57 PM PST I have a few ideas, but would like to learn some more concrete and detailed reasons. [link] [comments]  |
| How does a coax splitter work? Posted: 12 Dec 2017 02:43 AM PST I've seen the inside of it and it looks like a bunch of resistors and capacitors between the input and output, so I'm assuming it's doing some noise filtering. Why would you do this? Don't you want whatever's at the input to be exactly the output? [link] [comments]  |
| Posted: 12 Dec 2017 01:36 AM PST For example, lead is a great conductor of electricity, but you can't stick a magnet to it. If electromagnetism is one unified aspect of physics, how is this reconciled with the differences between two seemingly separate aspects of physics? Or if I'm wording the question wrong, how should we separate aspects of electricity and magnetism? [link] [comments]  |
| Posted: 11 Dec 2017 04:01 PM PST Is the above reverse motion of electrons to the lower-capacity battery prevented by the orientation of + and - wires, or would the partitioned layout of the cathodes and anodes prevent it? I am assuming entropy would be the main motivation for electricity stopping its flow if the above is true. [link] [comments]  |
| If our bodies are conductive, can holding a battery between two fingers deplete it completely? Posted: 11 Dec 2017 06:25 PM PST Let's say you have a new AAA battery and hold it between your thumb and index finger. Given that the human body has some resistance, but is still conductive, if you hold it for a long enough time, can you deplete it completely? How long would it take? [link] [comments]  |
| What can stop and/or destroy a black hole? Posted: 12 Dec 2017 12:59 AM PST Can black holes be stopped somehow or they continue endlessly to absorve everything around them? [link] [comments]  |
| Posted: 11 Dec 2017 10:41 AM PST How is it possible to prove anything using an unproven theorem? Is the converse also true (that is, if the Riemann hypothesis is false, are theories contingent on it also proven false?) What type of theorems depend on the Riemann hypothesis? How is it useful to make such an assumption? [link] [comments]  |
| Are there any ant species that don’t live in colonies? Posted: 11 Dec 2017 06:38 PM PST |
| Do they update the voyager software? Posted: 11 Dec 2017 08:04 AM PST I was watching a documentary on the voyager satellites yesterday and was wondering about the software on it. Has the software been unchanged since it launched? If you could send a signal to earth from that far away could you issue software updates as needed? Also, what language was the software coded in? Thanks reddit! [link] [comments]  |
| How did the Russian Woodpecker receiver work? Posted: 11 Dec 2017 09:16 PM PST So I (roughly) understand how the Russian Woodpecker's OTH radar worked. Bouncing radio waves over the horizon, interpreting the bounce back, and extrapolating moving objects therein. But I've always wondered about the enormous array at Chernobyl, which I only found out today was just the receiver, with the transmitter about 50km away. How did the enormous receiver work to catch signals? Why all the crazy trapezoids/funky shapes? What actually 'caught' the signal and what was just support? If this was an effective design, why don't we see it elsewhere? [link] [comments]  |
| What is meant by the heat death of the universe? Posted: 11 Dec 2017 06:55 PM PST Does it mean something like all matter will cease to exist or will it return to a state similar to "time" (even though time technically doesn't start before the big bang if I am not mistaken) before the big bang? Or are these ideas completely off? From a basic google search, it says that it is a state where entropy cannot increase and thermodynamic processes can no longer occur. What does this mean for the matter of the universe? [link] [comments]  |
| Does language affect learning and studying? Posted: 11 Dec 2017 06:12 AM PST What I mean by this is do different languages explain concepts better and can you learn something better in another language. Say person A is equally fluent in 2 languages and the person is studying something which has specific terms and concepts. Is it better to study with one language than the other. Could it be different when studying in different ways(viewing, listening). [link] [comments]  |
| Posted: 11 Dec 2017 06:40 PM PST I was in a lap and we were working with acetic acid (vinegar) and it was highly concentrated. This idiot says something along the lines of Vinegar aint dangerous and takes a sip. I then watched him spit out his gums. Why is it that acids like Sulfuric, Nitic, etc are always portrayed as these ultimately corrosive substances despite concentration? Is there something to these "famous" acids that make them more deadly? And arent bases scarier to spill on you? [link] [comments]  |
| Posted: 11 Dec 2017 07:29 AM PST |
| Posted: 11 Dec 2017 08:39 PM PST A small amount of Googling tells me it has to do with the power supplied. What I'm looking for is an easy and succinct explanation to convince a friend, who says wi-fi is just as dangerous because they have the same frequency, that there is a difference. I can't get through to him and may be a lost cause, but I'm not great with words in the heat of the moment so feel like I'm failing him, when I should have an answer. [link] [comments]  |
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