Who killed Meredith Kercher? part 23

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I made a bet with myself you would make a comparison with that and, unsurprisingly, you did. Oh, if here had ONLY been a broken window, too!

The salient point is that no one had to apologize as you keep claiming.

Once again, your psychic abilities reveal what Amanda was thinking. Have you thought of opening a booth in Blackpool and charging clients for this gift?

Amanda herself confirmed she apologised. So. Joke. Not. Funny.
 
Firstly:


60.5 joules = 44.622510033 lb force lbf*ft.

Uh, thank you for the irrelevant unit conversion.

The foot-pound is often used to specify the muzzle energy of a bullet in small arms ballistics, particularly in the United States.

Well, you may not know how to do the actual physics, but you sure can look up facts about the history of units used in small arms ballistics. Yay Vixxiepoo.

Secondly, Joules as a measure for kinetic energy in guns is NOT linear.

This, unfortunately is gibberish. Kinetic energy is a physical property of an object in motion. "Linear" refers to a property of functions that preserve addition and scalar multiplication.

Thus just because the average gun fires at 245 Joules, for a rock impacting at 60 joules, it does NOT follow that therefore, it is 1/4 the power of the gun.

Work is the change in kinetic energy and power is Work divided by time. So power is equal to dKE/t. Thus a functional map relating KE to work is indeed linear.

I have no idea why you are bringing up power anyway because it is irrelevant as we're interested in the energy imparted on the glass by the rock. You have absolutely no idea what you're talking about, and you aren't smart enough to realize you have absolutely no idea what you're talking about.

As you can see 2.50 joules is not four times the power of 0.67 Joules but twice

What the Christ **** does this even mean.

(I know nothing about gun/bullet measures so would hazard a guess it is similar to decibels, where magnitude is the salient measure)

Uh, logarithms? You're saying gun/bullet measures are logarithmic like decibels? You are so confused about everything I don't even know where to begin.

Quantities relating to motion are the standard Newtonian mechanics concepts. Bullets and guns aren't some magical otherworldly category that have special measures. Kinetic energy and momentum are the relevant variables. I used energy because it was easier. Pretty sure Numbers did momentum earlier and showed you that a shard of glass would be moving fast enough to embed in wood.

http://www.airsoftmaster.com/fps-chart-for-airsoft-guns/ Therefore, it is likely a misconception that 60.5 makes the presumed rock thrust a quarter of the strength of 245 - an average bullet.

This doesn't even mean anything. "strength" "thrust", "0.65", "245", "average bullet" lol wtf.

In physics, a pound is unambiguously a measure of force and a kilogram is unambiguously a measure of mass.

Yeah thanks. Maybe you should stick to figuring out what mass and force are before you start trying to actually do physics.
 
Amanda herself confirmed she apologised. So. Joke. Not. Funny.

Yes, which is what I posted earlier. No one "forced" her to apologize as you first claimed. Nor did she "have" to apologize as you later claimed. She apologized because she chose to...immediately. So. You. Are. Making. Things. Up. Again.
 
When did I say it was a rape prank? Your imagination is running riot.

More tea...?

My apologies.


Likewise, a acquaintance of Amanda contacted the Perugia police within days of Amanda's arrest to inform them that she had staged a burglary on a roommate who had slept with her boyfriend, and had been made to apologise as the girl was left distressed by the act.
 
Uh, thank you for the irrelevant unit conversion.



Well, you may not know how to do the actual physics, but you sure can look up facts about the history of units used in small arms ballistics. Yay Vixxiepoo.



This, unfortunately is gibberish. Kinetic energy is a physical property of an object in motion. "Linear" refers to a property of functions that preserve addition and scalar multiplication.



Work is the change in kinetic energy and power is Work divided by time. So power is equal to dKE/t. Thus a functional map relating KE to work is indeed linear.

I have no idea why you are bringing up power anyway because it is irrelevant as we're interested in the energy imparted on the glass by the rock. You have absolutely no idea what you're talking about, and you aren't smart enough to realize you have absolutely no idea what you're talking about.



What the Christ **** does this even mean.



Uh, logarithms? You're saying gun/bullet measures are logarithmic like decibels? You are so confused about everything I don't even know where to begin.

Quantities relating to motion are the standard Newtonian mechanics concepts. Bullets and guns aren't some magical otherworldly category that have special measures. Kinetic energy and momentum are the relevant variables. I used energy because it was easier. Pretty sure Numbers did momentum earlier and showed you that a shard of glass would be moving fast enough to embed in wood.



This doesn't even mean anything. "strength" "thrust", "0.65", "245", "average bullet" lol wtf.



Yeah thanks. Maybe you should stick to figuring out what mass and force are before you start trying to actually do physics.




"Rudy slung a slab at a quarter of the speed of a bullet".
 

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"Rudy slung a slab at a quarter of the speed of a bullet".

lmao after all of Vixen's physics posturing she can't distinguish kinetic energy from speed. This exchange is super amusing and all but I'm bored now. Any further physics lessons from me and I'll have to charge a fee. Particularly for the more dense students.
 
lmao after all of Vixen's physics posturing she can't distinguish kinetic energy from speed. This exchange is super amusing and all but I'm bored now. Any further physics lessons from me and I'll have to charge a fee. Particularly for the more dense students.

Not surprised. The egregious abuse of basic physics is spectacular. There comes a point at which one must draw a line and admit there are some who cannot be educated.
 
lmao after all of Vixen's physics posturing she can't distinguish kinetic energy from speed. This exchange is super amusing and all but I'm bored now. Any further physics lessons from me and I'll have to charge a fee. Particularly for the more dense students.

Not surprised. The egregious abuse of basic physics is spectacular. There comes a point at which one must draw a line and admit there are some who cannot be educated.

Can the difference between velocity (or its magnitude, speed) and kinetic energy (a property that depends upon both mass and the square of velocity) really be that obscure to any half-way intelligent person? Isn't this alleged inability of a poster to understand just one more hoax promulgated by a guilter or someone posing as a guilter?

But I like the idea of charging hard cash for any additional physics lessons.
 
Can the difference between velocity (or its magnitude, speed) and kinetic energy (a property that depends upon both mass and the square of velocity) really be that obscure to any half-way intelligent person? Isn't this alleged inability of a poster to understand just one more hoax promulgated by a guilter or someone posing as a guilter?

But I like the idea of charging hard cash for any additional physics lessons.

I don't really know. Personally, I would have vehemently denied that any person existed who had never thrown a rock at something. Thanks to this thread, I have had to revise that conclusion.
 
Firstly:


60.5 joules = 44.622510033 lb force lbf*ft.

The foot-pound is often used to specify the muzzle energy of a bullet in small arms ballistics, particularly in the United States.

Secondly, Joules as a measure for kinetic energy in guns is NOT linear. Thus just because the average gun fires at 245 Joules, for a rock impacting at 60 joules, it does NOT follow that therefore, it is 1/4 the power of the gun.

As you can see 2.50 joules is not four times the power of 0.67 Joules but twice (I know nothing about gun/bullet measures so would hazard a guess it is similar to decibels, where magnitude is the salient measure) http://www.airsoftmaster.com/fps-chart-for-airsoft-guns/ Therefore, it is likely a misconception that 60.5 makes the presumed rock thrust a quarter of the strength of 245 - an average bullet.

Notandum

In physics, a pound is unambiguously a measure of force and a kilogram is unambiguously a measure of mass.

from wiki:

https://en.wikipedia.org/wiki/Muzzle_energy


Well...... first of all:

YOU KNOW ABSOLUTELY NOTHING ABOUT EVEN BASIC PHYSICS. AND YOUR ATTEMPTS TO PRESENT FURTHER "ARGUMENTS" IN THIS RESPECT ARE UTTERLY, UTTERLY PITIFUL - AND ENTIRELY, WHOLLY, INCORRECT. IT'S LAUGHABLE. THAT'S THE TRUTH. FULL STOP.


I have no appetite to address the sheer avalanche of wrongness within this one post - just as every single post of your covering ballistics and the physics of motion has been all kinds of wrong. Every SINGLE calculation within this post is wrong. It's pathetic.

But this one little piece deserves to be called out for special attention. You have no idea what the foot-pound is, nor the type of quantity it represents, nor where it is usefully employed. You ludicrously believe it's a measure of "muzzle energy". It's not even a measure of energy. It's a measure of TORQUE, Vixen. You don't know what torque is, do you Vixen? That's because you are ignorant of physics.

Torque, for your education, is the turning force applied to an object such as a screw. Technically the foot-pound is an incorrect quantity for measuring torque, since the unit should be force multiplied by distance - but since "pound" in this instance can be taken as a linear proxy for "pound-force" (which IS a measure of force, and is calculated as mass in pounds multiplied by the acceleration due to gravity -e.g. one pound of mass exerts 9.8 pounds-force of force), the foot-pound can usefully be used as a measure of torque. However, the Newton-metre (NM) is a better, more appropriate, and more commonplace measure of torque these days.

What the foot-pound categorically is NOT, and could never be, is any type of measure of energy, as fatuously claimed in your post. In small-arms ballistics, the foot-pound actually relates to the spin applied to a small-arms bullet by the rifling within the barrel - a certain torque is applied to the bullet as it travels down the barrel, in order to make it spin around its longitudinal axis in flight (thus vastly improving flight characteristics). But of course you don't understand that either. Are you just writing whatever comes into your head, in the absence of even a modicum of knowledge or research? Seriously? Is that what's going on here?

Please could a pro-guilt commentator with even an ounce (or should that be a lb-foot per inch mile squared....) of integrity and even the most basic knowledge of physics kindly quietly inform Vixen of just what an embarrassing blizzard of wrong she's been posting in her "arguments" about ballistics and the physics of motion here over the past few days. Because obviously she believes that our laughing at her ignorance and incompetence in this field is driven purely by some form of partisan blinkering. Who knows: perhaps then, the message might finally get through............



ETA. No, no, I see one other small sentence which also deserves to be called out for its fundamental ignorance. It's this:

In physics, a pound is unambiguously a measure of force and a kilogram is unambiguously a measure of mass.


Vixen....... a pound is, erm, unambiguously NOT (and never was, and never will be) a measure of force. You have, as I say, no idea of even the most basic concepts of physics. Rather, a pound is unambiguously a measure of mass (just like a kilogram is). The unit of force associated with the imperial pound system is the pound-force. The pound-force is exactly as different (in magnitude and unit) from the pound as is the Newton from the kilogram. But you don't understand this, do you Vixen? Pitiful.

(Oh and by the way, with reference to that wiki entry, the US use a proxy measure for muzzle energy which is denominated in units of foot-pound-force - NOT "foot-pounds" (which are a different quantity altogether). But of course Vixen doesn't know or understand the difference between "foot-pounds" and "foot-pounds-force")
 
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Not surprised. The egregious abuse of basic physics is spectacular. There comes a point at which one must draw a line and admit there are some who cannot be educated.


I entirely concur. As I've written before, the extraordinary ignorance of physics and the sheer magnitude of mistakes and fundamental misunderstandings contained within Vixen's "arguments" genuinely make me wonder whether it's all actually a knowing satire. But actually, history and other factors make me believe it's all, sadly, too real. Which makes it all the more extraordinary. I've never seen physics this wrong, and repeatedly, woefully wrong, from anyone over the age of about 10 in my whole life.
 
I don't really know. Personally, I would have vehemently denied that any person existed who had never thrown a rock at something. Thanks to this thread, I have had to revise that conclusion.

Maybe the problem is that some persons - perhaps more so in Europe - have never bowled (ten-pin bowling as in the US)?

Bowling balls range in weight from 6 lbs to 16 lbs, with the lowest weights for children. Now, while bowling balls used in ten-pin bowling are propelled along the surface of a lane (or alley) by three fingers in the respective holes, I can picture someone throwing a bowling ball of 8, 9, or 10 lbs, using a basketball-type throw (not a bounce pass), two-handed, or if one's hand is large enough, one-handed.

I'm not saying that the rock was a bowling ball, but its weight of about 8.8 lbs, based on its reported 4 kg mass, was well within the range of that of bowling balls.
 
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LOL. You don't think she would have voluntary confessed to this at the time? Her blog is her downplaying anything incriminating. Thus, we are told, the idea of her being guilty was merely the 'imagination' of us all, and her seeing Patrick at the basketball court and hearing Mez' scream, was all her imagination.


Give me a chance, and I'll find the source which stated someone contacted Perugia police to report the 'prank', which AIUI involved her wearing a sinister ski-mask.

Here you go:
Rumours of the hazing prank have been around for years, after a former acquaintance of Knox’s let the story slip, just a month after her arrest. On being pressed for details, the informant clammed up, and the incident has subsequently been vociferously denied by members of Knox’s family and her supporters. Meanwhile her defence have made repeated references to Rudy Guede’s past actions as character evidence against him.


Just one source. http://truejustice.org/ee/documents/perugia/amanda-knox-admits-staging-burglary.html

Nope, that's not a source.
That one is just the copy of a now deleted (wonder why) online article based on the source (Amanda Knox's blog comment).
The "source" for this story is, as laid out by Stacyhs here, the comment of someone calling themselves "Joh" made here, and the confirmation attempts posted here and here.
Anything else is not a "source" but speculation. ;)
 
I said nothing about an assault.

No, you didn't. I thought you had along with your false claims such the "victim" slept with Amanda's boyfriend and it wasn't on April Fools' Day. Perhaps this was due to the fact you did reference the source of the myth (Joh's comment on The Stranger) as proof that someone had contacted the Perugia authorities about the prank. In that comment is a claim of assault on the "victim". If you pass on the myth of the ski masks why would you not also believe the rest of it, including the alleged assault?

"Give me a chance, and I'll find the source which stated someone contacted Perugia police to report the 'prank', which AIUI involved her wearing a sinister ski-mask. " Comment #1395
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Once again, Joh's comment:

"Knox once got a bunch of her friends to dress up in ski masks and break into her apartment and assault her roomates as an "april fools" joke."
 
Ah. I see Methos beat me to the punch by a minute.

I also see that Skeptical Bystander also says she did not try to contact the original source, so the only source we are left with regarding the "assault", "breaking in" and "ski masks" is Joh. Uh huh.
 
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Why are you mixing imperial measure with metric? I can only think of a single reason. Obfuscation.


Oh no: I think a combination of abject ignorance and wholesale inability to understand the concept of units of measurement - and the associated concept of which SI and imperial units measure the same quantity and which measure different quantities - is probably a more likely explanation here.
 
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