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Question by tia: Physics………?
Can someone please give me difference and similarity between STRESS and PRESSURE in terms of elastic bodies…….
Need it soon please HELP!!!
thanks in advance!!!!

Best answer:

Answer by neoga illinois
think of a steel tank full of propane gas like you see in peoples back yards who live in rural areas. there is stress in the steel that makes up that tank. there is propane gas inside the tank that is under 3 atmospheres of pressure. there is air outside the tank which is under 1 atmosphere of pressure. so the metal tank wall is being pushed by 2 atmospheres of pressure from inside. that pressure causes stress and strain within the steel material of the tank.

pressure is just force divided by the area overwhich the force is applied. pressure is just one way to cause stress and strain. pressure pushes and contacts the OUTER SURFACE of the steel tank, like the atmosphere does, or it pushes against the inner SURFACE like propane. but stress and strain is measuring ‘pull-apart’ forces INSIDE the steel.

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wiccan whirled

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Prophetic Conspirators: Psychedelic Water ~
“How are you enjoying Oz?” the shaman asked the intrepid visitors. Cheers and laughter erupted from the sparking bonfire on the other side of the party-strewn paddock, where flittering gouts of flaming starlets poured up to greet the Milky Way.

“It great,” Zen beamed through the smaller campfire. “We want to live here, but our visa run out soon.” He turned to his partner Shi, who was briskly nodding her agreement. The Japanese couple was obviously enjoying this taste of tribal tepee life in the hippified Rainbow Region of Oz, yet they’d shifted an arm’s length apart amid the small circle of newfound friends. Despite their recent exposure to naked hippies and public lovemaking, the shaman surmised the couple’s rigidified Nipponese upbringing still ensured they betrayed no overt signs of physical affection.

“You can always come back, bud,” Cameron assured him.

Zen balanced Shi’s hand on his knee. “I want to. We want to.”

“You’ve had no trouble here?” asked Cameron. The young travelers looked to one another before Shi answered for them both; “No, not trouble. Just some old people swear at us in Queensland.” She shrugged her slight shoulders while flying foxes screeched through the treetops.

“You may encounter that with many older people here, particularly in Queensland – because of World War Two. You know what I’m talking about?” Ram felt like Basil Fawlty attempting to be diplomatic as the thought ‘Don’t mention the war’ flitted through his bedazzled noggin. The visitors glanced at each other again before Zen nodded. “Yes, we hear of it,” he affirmed.
“Well… older Queenslanders and other people in the north of Oz will never forget that the rest of the country was willing to hand them over to Japan if New Guinea fell.”

“Everything north of Brisbane,” Cameron agreed. “And – well, no offence, but there were some hideous atrocities committed in that war and a lot of older people don’t forget that, either.”

Zen tilted his head to one side. “Really?”

“There certainly were,” the shaman prince carefully enunciated each word through the flickering firelight. “Almost a lifetime ago now. There is a new generation in Japan that has been told nothing of it – and isn’t responsible for any of it. We certainly do not hold it against you. But the generations before us will never forget and many will never forgive – and the fact that nothing is taught about it in Japan is a real concern to much of the world.”

“That’s right,” Cameron agreed. “Most of my older relatives hate Japan to this day. We grew up hearing horror stories about guys being carved up and tortured from my uncle. He was in the Pacific…”

“You have to remember,” Ram said with a glance to Cameron, “propaganda was at least as bad on all sides as it is today. Even worse in wartime, of course. The history we read and were taught isn’t very accurate either – it was written by the victors, after all…”

“Always is,” concurred Cameron.

“…There were atrocities on all sides – though the ruling caste of the Japanese government considered themselves superior to all other races, just like the Nazis. They treated everyone else just as badly as the S.S. did the Jews and Gypsies.

“Japan created a slaughterhouse all around them before Hiroshima was bombed,” Ram continued, holding Cameron’s firelit gaze. “But you know, they were actually forced into the war.”

“They were? I’ve heard that, but what do you mean? What about Pearl Harbour?” Cameron’s interest flared with the firelight.

“The West cut off their oil supplies and just about everything else they needed to make themselves self-sufficient in a colonial world. The Japanese elite realised they could take the Western Pacific only if they could destroy the US military there in just six months – by wiping out its Pacific fleet in one stroke. Their plan actually unraveled right at the beginning at Pearl Harbour, when some of their targets escaped; but it’s all a long story, like the Opium Wars…”

“Ah,” Zen nodded. Shi was obviously struggling to keep up with the conversation and he translated in a rapid burst of Japanese. “This very difficult, but interesting for us,” she said as comprehension dawned on her pretty face.

“Mind you,” Ram continued, “Japan took Manchuria – though they may have had ancestral links to the place – and the shocking war against China was fought in a despicable manner. Japan hadn’t signed the Geneva Convention…”

“No…” Zen asked the question as a statement.

“No,” Cameron averred.

“You don’t mind discussing this?” the Prince belatedly asked the young couple.

“No, we not mind,” Zen sayid for them both. “We want to know.”

“Well… you know that Japan bombed the city of Darwin, in the north of this country? Destroyed it completely?” Cameron asked. The visitors shook their heads in confusion. “Bombed many, many times. Or that midget submarines attacked Sydney Harbour?” The visitors were nonplussed.

“No…” Shi breathes. “We not know…”

“It cuts both ways,” Ram observed. “Australians weren’t told the truth about Darwin either, thanks to the excuse of wartime censorship. And we know so little about Nippon or its history – and everything we think we know is twisted out of true by the media, intelligence agencies and politicians.” Watching the Japanese couple feel the pressure of the past, bowing their heads toward the fire and frowning in consternation, he decided to change the subject; “You’ve had no trouble with young people here?”

“No,” Shi smiled, looking up from the flames. “Mostly it’s great.”

She turned to watch Mandy emerge from the night and pull a deckchair up by the fire. Ram’yana was aware that the feral had been silently observing the conversation while twirling her blond dreadlocks in the shadows. He watched her watching the Japanese. She and her beau were slowly constructing their place in the Sun on the Star Earth tribal land, after their shady love shack mysteriously burned down a few weeks before the festival.

“When you come back from Japan you’d better arrange to bring some more of those young hippies with you,” Cameron laughed. “Save them by bringing them here to this hippy preserve.

“If we make it back,” Zen said, “Before something bad happen.”

“You think something bad is going to happen?” Cameron leaned forward into the heat. “Like what? War with China?”

Zen looked him in the eye. “Maybe that. Maybe something else. Not know what – but something. Many feel it in Japan. Things cannot go on as they are – something big is coming.” The Westerners sat in silence as he continued. “Maybe the Earth will rebel… But it good for me – it probably necessary for enlightenment, to go into the next… dimension?” *

“That’s the word,” the shaman assured him.

“Next dimension is where we all need to go. The next level.”

“I understand,” Ram said slowly, “but you know – it isn’t necessary to die to achieve enlightenment.” He caught Mandy’s approving smile across the flames. Zen appeared nonplussed. “And if there are another series of dimensions beyond this one – not parallel universes, but higher geometric dimensions – you know what I mean?” Zen nodded, hanging on every word. “Then we must already be in them, they must be accessible to us from here.” He saw he was moving beyond the visitors’ comprehension of English and took another tack that dovetailed with Zen’s interest in physics. “If eleven dimensions exist then how can we only exist in three or four of them? We must extrude, project, into all of them already. Understand?”

“Hmmm. This is very interesting. It not be necessary to die to be there… but how?”

“You know that the way out is always in?” the shaman asked him. Zen nodded in time with Shi. “Meditation, and the conscious development of the wider supersenses available to us; conscious exploration of those realms that we already extrude into, learning to see with new eyes… Armageddon isn’t necessary to achieve enlightenment. Purification by fire is not something you need to go through. You are free now.”

“Many people in Japan think we must die to go on,” Zen said. “They think it a good thing. This is very interesting. I must think about this…”

“Many people think the same thing here, too,” Cameron sympathised. “But we have to go on and endure. It’s too easy the other way. ‘Nobody gets off until the mess is cleaned up.’ ”

The visitors nodded more profusely at this sage pronouncement…

Continues @…

Jerry Nelson

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2 thoughts on “Physics………?

  1. husnitahahusnitaha

    Stress (physics) – Wikipedia, the free encyclopedia
    The SI unit for stress is the pascal (symbol Pa), which is a shorthand name for … 3 Equilibrium equation and symmetry of the stress tensor …

    (Stress) (Strain)
    Temperature Entropy
    Chem. potential Particle no.


    p = frac{F}{A} mbox{or} p = frac{dF}{dA}


    p is the pressure,
    F is the normal force,
    A is the area.

    Pressure is a scalar quantity, and has SI units of pascals; 1 Pa = 1 N/m2, and has EES units of psi; 1 psi = 1 lb/in2.

    Pressure is transmitted to solid boundaries or across arbitrary sections of fluid normal to these boundaries or sections at every point. It is a fundamental parameter in thermodynamics and it is conjugate to volume.

    [edit] Units
    Mercury column
    Mercury column

    The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N·m-2 or kg·m-1·s-2). This special name for the unit was added in 1971; before that, pressure in SI was expressed simply as N/m2.

    Non-SI measures such as pound per square inch (psi) and bar are used in some parts of the world. The cgs unit of pressure is the barye (ba), equal to 1 dyn·cm-2. Pressure is sometimes expressed in grams-force/cm2, or as [[kg/cm2]] and the like without properly identifying the force units. But using the names kilogram, gram, kilogram-force, or gram-force (or their symbols) as units of force is expressly forbidden in SI. The technical atmosphere (symbol: at) is 1 kgf/cm2.

    Some meteorologists prefer the hectopascal (hPa) for atmospheric air pressure, which is equivalent to the older unit millibar (mbar). Similar pressures are given in kilopascals (kPa) in most other fields, where the hecto prefix is rarely used. The unit inch of mercury (inHg, see below) is still used in the United States. Oceanographers usually measure underwater pressure in decibars (dbar) because an increase in pressure of 1 dbar is approximately equal to an increase in depth of 1 meter. Scuba divers often use a manometric rule of thumb: the pressure exerted by ten metres depth of water is approximately equal to one atmosphere.

    The standard atmosphere (atm) is an established constant. It is approximately equal to typical air pressure at earth mean sea level and is defined as follows:

    standard atmosphere = 101325 Pa = 101.325 kPa = 1013.25 hPa.

    Because pressure is commonly measured by its ability to displace a column of liquid in a manometer, pressures are often expressed as a depth of a particular fluid (e.g., inches of water). The most common choices are mercury (Hg) and water; water is nontoxic and readily available, while mercury’s high density allows for a shorter column (and so a smaller manometer) to measure a given pressure. The pressure exerted by a column of liquid of height h and density ρ is given by the hydrostatic pressure equation p = ρgh. Fluid density and local gravity can vary from one reading to another depending on local factors, so the height of a fluid column does not define pressure precisely. When millimeters of mercury or inches of mercury are quoted today, these units are not based on a physical column of mercury; rather, they have been given precise definitions that can be expressed in terms of SI units. The water-based units still depend on the density of water, a measured, rather than defined, quantity. These manometric units are still encountered in many fields. Blood pressure is measured in millimeters of mercury in most of the world, and lung pressures in centimeters of water are still common.

    Presently or formerly popular pressure units include the following:

  2. Josh

    dude what the hell.

    any normal idiot can copy and paste from wikipedia…
    she wants an actual answer that she can understand


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