Why does choked flow happen and why it is related to the speed of sound ? |
- Why does choked flow happen and why it is related to the speed of sound ?
- Why did old CRT TVs get some discoloration when you hold a magnet up to them?
- Is there any lunar crater contemporary (possibly or confirmed) to the Chicxulub crater (~ 66mya aka the 'dinosaur killer')?
- Are trinary star systems possible?
- Why aren't all spontaneous chemical reactions also instantaneous?
- Why does chemical equilibrium exist at all? If an end product has a lower energy than a reactant, why don't we get 100% product yield all the time?
- What does it mean for a drug to be unchanged renally?
- Would a blood transfusion alter DNA?
- Can synthetic diamonds be grown into any shape, or do they have to be cut into shape once they are fully formed?
- Have we ever found any meteorites that originate from outside our Solar System? Would it possible to radiogenically date such samples?
- How do telescopes for deep space messaging work?
- Do bugs go to sleep at night? Or do some do and some don't? and is this the reason you don't see as many of certain types of bugs at night?
- Are communism and fascism mutually exclusive?
- How does anathesia work?
| Why does choked flow happen and why it is related to the speed of sound ? Posted: 30 Nov 2019 05:51 AM PST I'm diving into the venturi effect (example: rocket nozzles and chocked flow happening in the admission valve of a ICE) and it seems that when the gas approaches the speed of sound, the flow starts to choke. Why does this happen ? [link] [comments]  |
| Why did old CRT TVs get some discoloration when you hold a magnet up to them? Posted: 30 Nov 2019 06:48 AM PST |
| Posted: 30 Nov 2019 01:16 AM PST |
| Are trinary star systems possible? Posted: 29 Nov 2019 10:39 AM PST |
| Why aren't all spontaneous chemical reactions also instantaneous? Posted: 30 Nov 2019 02:57 AM PST I am struggling to understand conceptually why spontaneous does not also mean that the reaction is instantaneous. If a reaction is energetically favorable then why doesn't it always proceed immediately? [link] [comments]  |
| Posted: 30 Nov 2019 02:46 AM PST |
| What does it mean for a drug to be unchanged renally? Posted: 29 Nov 2019 05:31 PM PST For example, If drug X is 25% renally excreted unchanged and drug Y is 80%, what are the clinical implications and impact? [link] [comments]  |
| Would a blood transfusion alter DNA? Posted: 29 Nov 2019 03:10 PM PST I recently got a blood transfusion which brought me to this question. If I got a DNA test or left behind some blood at a crime scene or something (not that I have ). Could that be traced to me? [link] [comments]  |
| Posted: 29 Nov 2019 04:41 PM PST Obviously most diamonds produced are just small, basic, geometric shapes. I'm wondering if it's possible to grow diamonds (through chemical vapour deposition I guess) into virtually any shape such as a long thin rod or even something hollow? My understanding of how diamonds are lab grown is very limited but I guess this could be achieved by only directing the chemical vapour at a certain angle at one point on the pre-existing diamond, thereby making it grow in a specific direction. [link] [comments]  |
| Posted: 29 Nov 2019 11:55 AM PST |
| How do telescopes for deep space messaging work? Posted: 29 Nov 2019 08:00 AM PST Are telescopes who receive and who send messages the same thing? How does the sending part work? I am writing an essay about active seti and didn't find anything about the technology site. Do you have any ressources or could explain it for me? [link] [comments]  |
| Posted: 28 Nov 2019 10:57 PM PST |
| Are communism and fascism mutually exclusive? Posted: 29 Nov 2019 12:34 PM PST Reading the Wikipedia page for fascism and communism (yeah, I know, unreliable), I realized it seems like there is no reason for a communist-fascist state to not be possible. Fascism and Leninism share the one party dictatorship, and with Trotskyism a strong military seems obligatory. And from what I gathered, fascism isn't opposed to state-owned economies. A problem I found with this is that Marxism is quite opposed to an authoritarian state, which clashes with the fascist autocratic government and such. What do you guys think? Is putting Communism and Fascism on opposite ends of the political spectrum wrong? [link] [comments]  |
| Posted: 28 Nov 2019 11:03 PM PST I know what it does and that its a science within itself but I can't for the life of me find how it does what it does. It seems that its been measured, observed and trusted but no one seems to quite know how or why it works! [link] [comments]  |
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