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Monday, April 1, 2024
What is the RPM of an aeroplane engine?
The RPM of an aeroplane engine is the number of revolutions per minute that the engine’s crankshaft or propeller makes. The RPM indicates the power and speed of the engine, with higher RPMs generally meaning more power. But, the RPM of an aeroplane engine depends on several factors, such as the type, size, and design of the engine, the altitude, temperature, and humidity of the air, and the throttle setting and load of the aircraft.
There are different types of aeroplane engines, such as piston, turboprop, turbojet, turbofan, and turboshaft. Each type has its range of RPMs, depending on the specific model and configuration. For example, a typical piston engine used in general aviation aircraft can have an average RPM of around 2500, while a typical turboprop engine can have an average RPM of around 2000. A typical turbojet engine can have an average RPM of around 8000, while a typical turbofan engine can range from 2500 to 4500. A typical turboshaft engine can have an average RPM of around 6000.
The RPM of an aeroplane engine can also vary depending on the altitude, temperature, and humidity of the air. The higher the altitude, the lower the air density, which means less air for the engine to intake and burn fuel. This reduces the power and the RPM of the engine. The higher the temperature, the lower the air density, which also reduces the power and the RPM of the engine. The higher the humidity, the more water vapour in the air, which displaces some of the oxygen and reduces the combustion efficiency. This also reduces the power and the RPM of the engine.
They can also change depending on the throttle setting and the load of the aircraft. The throttle controls the amount of fuel and air that the engine receives, and thus the power and the RPM of the engine. The higher the throttle, the higher the power and the RPM of the engine. The load of the aircraft refers to the weight and drag that the engine has to overcome to fly. The higher the load, the more power and RPM the engine needs to produce to maintain the same speed and altitude.
Wow Pictures
- OMG 🙈🙉🙊
2. I'll catch ya 😎
3. Warning
4. You can't see me
5. Oh my heart 😂😂
6. Don't disturb me 😴
7. Hey wanna have fun?😎
8. Let me chill 😋
9. I'm a rider 😈
10. Yuuuu… huuuuu…
11. Oh by back 👴
12. Haaa… haa… haa…😂😂😂
13. 🤐🤐🤐
14. Lets go son 👣👣
15. Oh you still wanna play…
16. We'll be home soon son🙂🙂
17. Hey ladies😎
18. You know what happened that day…???
19. I have 3 fingers 🐦
20. I think I heard something 🐿
21. Hey we're not thefting… 😅
22. Hey can you give some?? 🙄
23. Don't leave me… don't leave me…
24. Hey human 👋
25. Everybody hide I'll count.. 1… 2… 3…
26. What are you looking at huhh… 🖕
27. How's my pose 🙂🙂
28. He… he.. heay… do you know me??😆😆
29. There was a time when we were… 💢💢
30. Am I still visible???
31. Opp…
32. Let me play my violen first…
33. Where do I hide..???
34. Hey dude let's chill 😝😜😛
35. Aa…haa…haa…haa 😂😅😂😅
36. I said no fishing allowed…
37. See my moves …🤐🤐🤐
38. Hey silence please 💢💥
39. Don't be afraid son, they'll just upvote the answer and go away 😉🖒
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Do you like them?… I'm sure you love them… 😄 and why wouldn't someone love them.. they are sooooo cuteeee.
But 😦
They all gonna die 😵. Why…???
Because human beings will kill them and within 20 years, most of them will extinct… 😢
Because humans are killing them… we are killing them 😣😭
Please realise it, make a safe world for them. They came first in this earth, not we. It's their home, not us. We are just guests not owner…
Do whatever you can… 🙏 even a small step will help them… please save them… it is in own hand… save them 🙏🙏😢😢
If you lack self confidence, read this:?
- CONFRONT YOUR FEARS
Face your fears head-on; failure is part of the journey to confidence.
2. DRESS SHARP
Dressing sharp boosts confidence; it reflects in your demeanor and appearance.
3. GET PHYSICAL FIT
Exercise boosts confidence by triggering a sense of accomplishment.
4. FOCUS ON GOOD BODY LANGUAGE
Good posture and body language project confidence effectively.
5. OWN YOUR STRENGTHS
Focus on your strengths to enhance self confidence and esteem.
6. DON'T TRY TO FIT IN
Embrace uniqueness; confidence comes from being authentic, not fitting in.
7. IMAGINE YOURSELF AT YOUR BEST
Visualise your best self to tap into confidence and energy.
Drop💯 if you reached here!
This shows you are a part of 1% who actually finish what they start.
What are some mind blowing facts that most people don't know?
- There is a species of jellyfish that never dies unless they are killed.
- The first condom was made somewhere in the 16th century.
- Russian was the first human language spoken in outer space.
- Lifetime warranties really mean the company’s lifetime, not yours.
- About 10 percent of the people in the world are lefties.
- Australia has over 10,000 beaches. You could visit a new beach every day for over 27 years.
- You have never technically watched a full movie because you are constantly blinking.
- Sound cannot travel in space because there is no atmosphere for it to travel through. As a result, space is completely silent.
- There’s a language with only 12 letters People on the island of Bougainville, speak a language with only 12 letters in it.
- If you make Ice Cubes with tap water, they will be white, and if you use boiled water, it will be transparent.
What is the maximum voltage a human can withstand?
I am surprised at the low quality of answers given here! Sorry to say, nearly all of the answers display a tenuous grasp of electronics and electrical nature, and use the age-old adage “it’s not the voltage, but the current that kills.” So I’ll clear things up, and hopefully save some people from misunderstanding this any further.
VOLTAGE, CURRENT, AND POWER
Voltage is related to the electric force between two points. More specifically, it is the gradient of the electric field, which in turn is a description of electric force. It is a description of electric potential energy, the ability of the electric field to force a charged particle and move it (i.e. the ability to do work). Because electric force exists between electric charges, voltage can also be interpreted as related the difference in charge between two points. Any time there is a voltage between two points, there must also be an electric field, though the electric field will actually depend on the physical distance between the two points.
When an electric field exists in an imperfect conductor, a current will flow in the conducting medium. Current is the movement of charged particles (electrons, ions, etc). In order for charges to circulate in a loop, a power source is required which might maintain the potential difference (the voltage) between two points by, we could say, ‘rearranging’ the charges: a voltage source. It could also maintain a constant flow of current: a current source. Either way, a potential difference (voltage) in an imperfect conductor will always cause a current. In imperfect conductors, the current will have many, many interactions with the conductor’s atoms. It’s like playing Plinko. This will then give more kinetic energy to the conductor’s atoms, and heat is generated. So any time a current flows in an imperfect conductor, heat is generated.
With these simplified definitions of voltage and current, we can look at some scenarios that will help clear up some of the confusion. If there is a voltage between two points, it means there is a difference in the quantity of charge between those points. This applies anywhere. If the charge difference is between two conductors, say a human hand and a doorknob, the charge difference will cause an “equalization”. Many charges will be moved very quickly because they are under a great force (by nature of there being a voltage). This is a current, but it is limited to the difference in charge between the two points. Once all the charges are moved, there’s no more current.
The voltage in this scenario is only dependent on the difference in the quantity of charges, but it can get into the thousands of volts, the kilovolts (kV). The limited quantity of charge that can possibly be moved, however, means this voltage is reduced to 0V very, very quickly, and the current flow is quite brief.
If, on the other hand, you have a power source, such as a voltage source, the potential difference will be maintained. The current that flows will be proportional to the resistance of the path, as long as the power source can supply enough current. That is key: Every power source can only supply current up to a point, called the rated current. So a AA battery, for example, can supply currents up to, maybe, 1A (1 ampere). You have to put it across a resistance that will not exceed this. If the “load”, the conductive/resistive path between the + and the -, is too low resistance, the battery’s internal resistance will limit any more current from flowing.
Voltage sources are much more common for the average consumer, so current sources we’ll leave by the wayside. Voltage sources include things like batteries and wall outlets. You can have constant voltage, which produces constant current, or direct current (DC), or voltage that changes continuously from a positive value to a negative value, producing a current that moves forwards and then back, over and over - an alternating current (AC). This is really only included in this description for completeness.
Anyway, all voltage sources have a rated current. If you exceed it, the voltage will simply get lower instead of the current increasing any more. For the voltage of the source, V, and the maximum suppliable current, Imax, we say the power of the source is P = V*Imax.
The power of a source is constant. Or at least ideally. If you convert the voltage to a higher voltage, the maximum current must decrease. If you want to convert the output to get more current, the voltage output will go down. Whatever you do, the product of the voltage and the max current will stay constant.
For example, given a AA battery with a voltage of 1.5V and a rated max current of 1A, the power is 1.5*1 = 1.5W. We can know “step up” the voltage from the battery (using a clever circuit called a switch mode convert) from 1.5V to as high a voltage as we want. Let’s put the voltage to 5kV (5,000 V) because that’s a very high and seemingly dangerous voltage. But we know the power is constant, at 1.5W, so the maximum possible current our circuit will be able to supply will be 1.5/5000 = 0.0003 = 300uA (300 microamps). After 300uA, the supply voltage will simply drop instead of supplying any more current, just as before.
This is a failure of the power supply, and the actual applied voltage will drop, so the load isn’t actually seeing the 1.5kV after you try to pass 300uA. Power supplies with higher power ratings will be able to source more current, supplies with lower ratings will be able to generate still less current, before they all hit their limit.
Side note: switching converters, or any voltage converter for that matter, will always have an efficiency rating. If you supply it with 1.5W, it might only be able to supply 85% of that, 1.2W.
MAN VS ELECTRICITY
Now we can talk about what happens when a current flows through a person. As was mentioned, current flow always generates heat. The more current, the more heat. The human body has a fairly high resistance, but not as high as one might think. To get current to flow requires a power source with a voltage that is fairly high, because we’re forcing the current through a lot of resistance. Here’s a familiar chart of what happens to a person at different currents.
The current passing through your body will be generating a lot of heat, enough to burn your insides. It will also mess with your nervous system, limiting your ability to control your muscles. The amount of current that can kill is rather low, at around 100mA+. The resistance of the human body is roughly between 100k and 1k, or 100,000 and 1,000 ohms. In the chart you can see the voltage required to get the corresponding current levels to pass through a human body at either side of the spectrum.
Now, knowing what we know about power, we see that a deadly amount of current will pass at between 100V and 10kV at 100–300mA, which would require a power supply that is not only at a voltage of 100V–10kV, but is also capable of supplying between 10W and 1kW (1,000W). If the power supply satisfies both conditions, you will be in danger. If it has a rated power of <10W, you’ll never be at risk, because either the voltage will drop (and thus the force causing the current is reduced, and the current will reduce) or the current will simply be too low to cause death. Assuming you fit in the 100mA part of the current survival threshold, anyway.
CONCLUSION AND OTHER CONSIDERATIONS
So what voltage can a person survive? Well if we’re considering death from heat, burning, and tampering with vital organs, it’s going to be between 100V and 10kV, as long as the power supply can actually produce the current that would kill you. An ideal, limitless power supply will always be deadly between 100V and 10kV, but in the real world there are always power limits.
This seems to imply that the human body can withstand any voltage, as long as the source of the potential difference (e.g. a difference in amount of charge) can’t produce currents high enough to burn you and disrupt your organs. Even if you have a voltage of 100MV (100,000,000V) between you and something else, you should be perfectly alright as long as no current can flow through you. Right?
This is actually interesting because I can’t say for sure that the human body will always be alright as long as the voltage difference is caused by something that can’t really supply current. If, for example, there are two 10ft square plates with a voltage of 100MV between them, and there’s no arcing or anything, and you’re between them, your body resistance should allow for a significant potential difference across you from the side facing one plate to the side facing the other. When that happens, the charges in your body will naturally want to reorient themselves, and I don’t know what risks you would face when this happens. Maybe you would see no change, maybe you would lose brain function and your heart would stop, but I would think the former to be more likely. I’d have to really think about it.
Anyway, let’s finish up by replacing “It’s not the voltage that kills you, it’s the amps!” with “Death by electrocution requires a high voltage power supply that has a rated power which allows for 100mA or more of current to flow under load.” It’s catchy, I guess.
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