Tag: science

Posted in Science & Nature

Dimensions: Time Warp

Posted on by Jinavie

The first three dimensions covered the three variables that determine space: length, width and depth. Then what could the fourth dimension possibly add? The answer is duration. The third dimension effectively becomes a point and the 4th dimension connects different 3D points to form a line that we refer to as time. For example, the “you” at this exact time is different to the “you” in five years time. These two “you”s are different (3D) points that lie on a 4D line (more specifically, your life). This is exactly the same principle as the 0th dimension being points in a 1D line, except three dimensions higher.

As a “moment” in 3D space is just a point on a 4D line, travelling from one point in time to another (i.e. time-travelling) would be as easy as walking along a straight line for a four-dimensional being. This concept is mind-blowing for us as we cannot fathom the concept of manipulating time. We are unable to see time as a dimension as we exist in a lower dimension. Every single moment in our lives is a brick that paves the road called time, meaning that we can only see each individual brick and not the overall picture. This is exactly the same as how a Flatlander could not understand the concept of depth and how we can be above them.

Although we see time as linear and straight, we are under the same illusion as the ant walking down the Mobius strip. Time is actually twisting and turning in the fifth dimension, creating multiple timelines that branch out like a tree of possibilities. These branches are influenced by our own choice, chance and the actions of others.
In other words, if a man proposes to girl A then he will go down the branch where he marries girl A. However, if he chose not to propose, he would end up marrying a different girl (or not at all). Therefore, he has entered a different branch than the girl A branch.
Now, if the man wanted to go from a timeline where he married girl A to another timeline where he married girl B, what could he do?

One method would be if he bent the 4th dimension (time) on itself through the 5th dimension to travel back in time to when he met the girl and not ask her number. This is exactly like folding a 1D line into a 2D circle to make the end point meet the starting point. However, to marry girl B he would have to make the right sequence of choices that lead to him marrying girl B (much like a role-playing game). This is the long-way round that would be too time-consuming and complex.

A simpler approach would be if he folded the 5th dimension through the sixth dimension and jump from the ending of timeline A to timeline B. This would be like the finger-lifting analogy we have been using time after time. If we pretend that the 5th dimension was a piece of paper, then we could fold it into a 6D cylinder so that the two edges meet. Now we are able to jump from one ending to another effortlessly, just as we did in the 2nd dimension.

It is easy to confuse the 5th and 6th dimension as they both deal with “alternate realitites”. Here is one way to differentiate the two: 5D space is like a 2D space for time – a flat plane where different timelines cross each other. Therefore, it can contain all of the possible outcomes from an initial condition – that depends on an action, choice or chance – such as your conception (visualise a dot on a piece of paper with many lines radiating out from it).
If we were to put a dot on a piece of paper above the first piece of paper (in the 3D space for time), we have entered a universe where there is a completely different starting point (before your conception), such as dinosaurs not existing. This means that the line called “you” may not even exist, and the two pieces of paper would never meet. The only way to jump from one piece of paper (5D) to the other would be through the 6th dimension.
Therefore, by jumping up a dimension, we gain a degree of freedom where we can move in yet another direction. This is seen between every dimension, such as 2D versus 3D. The 6th dimension merely lets us travel between different sheets of 5D paper.

So somehow we have reached the 6th dimension where one can not only time-travel, but jump from one alternate reality to another. Shall we venture further into the seventh dimension – infinity – and beyond?

(This post is part of a series exploring the concepts of dimensions. Read all of them here: https://jineralknowledge.com/tag/dimensions/?order=asc)

(Stick figures from xkcd)

Posted in Science & Nature

Murphy’s Law

Posted on by Jinavie

In 1947, an aerospace engineer named Edward A. Murphy Jr was involved in high-speed rocket sled experiments led by the US Air Force. The aim of the experiment was to research the effect of sudden deceleration on the human body so to improve the safety of jet fighter pilots. To study this, a flight surgeon named Dr John Stapp devised a “sled” attached to a rocket that could be used on a long track. The rocket would propel the sled to a massive speed and brakes would induce as sudden deceleration. However, they found that the machines that were used to measure the G-force (force of deceleration relative to the force of gravity) were unreliable. Murphy proposed that they use electronic strain gauges attached to the harness of the test subject to measure the G-force, something he learned while working with centrifuges.

The idea was great but there was one problem: the gear kept failing, showing no reading whatsoever. Murphy soon found that the sensors were attached correctly but were wired backwards. This simple mistake frustrated Murphy, who blamed the incompetency of his assistant, stating that “if that guy has any way of making a mistake, he will.” This became the famous Murphy’s law, now simplified to “Anything that can go wrong will go wrong”.

Murphy’s law actually played a fundamental role in defensive design, where the worst-case scenario is always assumed and prepared for. Thanks to this system, the rocket sled experiment was successful and in 1954 Dr Stapp became the fastest man in the world – travelling at a speed of 1011km per hour and decelerating at a force of 46G (it was hypothesised that a human being could not survive past 18G). Not only did he survive (albeit with broken limbs, ribs, hernias, detached retina and temporary blindness), Dr Stapp went to build bigger rockets to further test the limits of the human body.

Interestingly, there’s another side to the Murphy’s law involving psychology. People suffer from a fallacy called appeal to probability, where they believe that because there is a possibility of something can happen, it will happen. The brain is surprisingly inefficient in dealing with probabilities and has a tendency to ignore that there is a relatively miniscule possibility and instead focuses on the absolute fact that there “is” a probability. This is the best explanation for why people are compelled to buy lottery tickets and why every student believes they will grow up to be rich and successful. 

Posted in Psychology & Medicine

Zombie

Posted on by Jinavie

Clairvius Narcisse died in Haiti on May 2, 1962. In 1980, he returned to his hometown. Alive.
How did a man who was dead and buried come back to life?

According to Clairvius, he was cursed by a bokor (sorcerer) to become a zombie but returned home after the curse was undone. The sorcerer had enslaved him in a sugar plantation for 16 years and many others were working as “zombie slaves” until they revolted, killed the sorcerer then ran away.
Harvard ethnobotanist Wade Davis studied and investigated this case extensively. According to his research, most “zombies” were placed in suspended animation to fake death and were then (often after being buried) put under psychosis by the sorcerer. Many Haitians believe in the ancient African religion of voodoo, where one legend says that when a sorcerer curses a person, they are revived after death to become the sorcerer’s slave. Thus, Haitians strongly believe in the legend of zombies. In reality, the sorcerer was using drugs to zombify people and Davis used his expert knowledge in botany to deduce what the chemicals were.

The so-called zombie powder was a combination of tetrodotoxin (TTX, blowfish poison) and datura (from the poisonous plant Datura stramonium). The TTX simulates death due to its paralytic effect and datura is a powerful hallucinogenic that causes the person to confuse reality and fantasy (dissociation). Also, it may cause memory loss which allows the sorcerer to easily manipulate the victim. Long-term maintenance of the datura dose could allow the sorcerer to enslave someone for a long period of time. However, the zombification is not the same as perfect mind control and more like a strong hallucination or hypnosis (as seen as the above mentioned revolution).

As it involves the handling of poisons, only an experienced sorcerer could give the right mixture of doses while avoiding the lethal dose. Although science has advanced greatly, there are still many things we can learn from magic and sorcery. The reason being, magic and sorcery are simply undiscovered science.

Posted in Philosophy

Untitled

Posted on by Jinavie

Solve the following riddle:

It is greater than a god and more evil than a devil.
The poor have it while the rich lack it.
If you eat it, you will die.

To find the answer, you must look within yourself and travel against the flow of time.

Continue reading “Untitled” →

Posted in Science & Nature

Piquance

Posted on by Jinavie

When the word taste is mentioned, people often think of sweet, sour, bitter, salty, savoury and spicy. But among these, only the first five are officially “tastes”. Spiciness is technically not a taste; it is rather a type of pain.
Due to the confusion between the words hot (which could mean temperature) and spicy (suggesting there are spice, but not specifying what type), scientists devised a new word called piquance to correctly name the sensation.
Piquance is caused by chemicals such as capsaicin stimulating the densely packed nerve fibres in mucous membranes in the mouth, causing pain. This sensation can be sensed anywhere covered by thin skin or membrane such as the eye. Tear gas and pepper spray exploit this by attacking the eyes, disabling sight, and the respiratory system, crippling breathing by inducing cough reflexes, to nullify the target.

Being a sensation, piquance can be seen as a subjective measure. Is there an objective way of measuring the piquance of a food?
In 1912, an American pharmacist called Wilbur Scoville utilised the fact that piquance is due to capsaicin to create something called the Scoville Scale. This scale’s unit is 1 Scoville Heat Unit (SHU) and is proportionate to the level of capsaicin.
The following is a list of many types of chilli and their SHU:

  • Paprika: 0
  • Peperoncini: 100-150
  • Jalapeño pepper/Tabasco sauce: 2,500-8,000
  • Chungyang red pepper: 10,000-23,000
  • Habanero chilli: 100,000-350,000
  • Red Savina habanero: 350,000-58,0000
  • Naga Jolokia: 1,067,286
  • Naga Viper: 1,382,118
  • Trinidad Scorpion Butch T pepper: 1,463,700 (currently the world’s hottest pepper)
  • Tear gas/pepper spray: 5,300,000
  • Pure capsaicin: 16,000,000

Posted in Science & Nature

Titanic

Posted on by Jinavie

Titanic is a film telling the story of the sinking of the eponymous ship, the RMS Titanic, directed by James Cameron in 1997. Most people are entranced by Leonardo DiCaprio and Kate Winslet’s excellent acting, the cutting-edge special effects and the waves of emotions that it projects to the audience, but there is another component that is just as amazing.
Most films and television shows tend to sacrifice science in the name of drama. Thus, science fiction movies are ironically quite inaccurate in even the most basic scientific facts. However, Titanic is strangely true to science despite being a drama film.

To start with, we can take the scene where Rose, embraced by Jack from behind, spreads her arms wide open like wings while on top of the stern of the Titanic. Here, Rose is seen standing so high that she is above the rails from the thighs up. In this position, even a slight push would cause her to lose balance and make her fall, causing the movie to end prematurely. But on closer inspection, it can be seen how Jack has his arms wrapping under the cables. To be so attentive to detail even in the moment of heated passion – Jack is surely a calm, cool-headed man.
In the scene where the Titanic is sailing, it takes 25 seconds for the ship to completely pass a point. Considering that the ship was 269m in length, this comes to a cruising speed of 38km per hour. This is 21 knots when converted – almost identical to the actual cruising speed of the Titanic which was 22 knots.

The movie is accurate in even finer details. Let us study the climactic scene of the sinking. When the ship is tilting at its highest point, a person took 4.3 seconds to fall and hit the water. This equates to a height of 91m, which can be achieved by a 269m ship tilting at about 40 degrees.
When Jack is bound by handcuffs, Rose bravely cuts the chain with an axe. But can a fair 18-year old girl summon such strength? If the chain is the thickness of two 5mm diameter metal rings, then the blade requires 49 Joules of energy to cut the chain. To achieve this, a 3kg axe must be swung at the speed of 20km/h, which is the same as dropping the axe from a height of 1.6m. Ergo, Rose can create enough energy simply by adding a little more strength to the axe as she swings it down from above her head.
Lastly, in the tragic scene where Jack sinks away, he disappears in 6.4 seconds. If by a rough estimate he sank about 2m, then it suggests that he descended at about 1/100 strength of free falling. This means Jack’s body density is about 1% greater than sea water. As the density of sea water is 1.04g per 1cm3, this is perfectly reasonable assuming that Jack is big-boned.

A film focussing on such fine scientific detail can certainly be called a masterpiece of the century. If only Rose’s voice did not echo in the final scene…

Posted in History & Literature

Darkness

Posted on by Jinavie

When you close your eyes, what do you see? When you look into the night sky, what do you see? Most people describe darkness as pitch black, but this is not quite true.
The colour that we see in perfect darkness is not black, but more of a dark grey colour. This colour has a special term called eigengrau, which is German for “intrinsic grey”. Similarly, when you look into the night sky the actual colour is a deep navy.

The reason for this is that the brain uses relative contrast to determine true black rather than the absolute brightness. So when you see darkness, the optic nerve still fires off some signals that the brain interprets as eigengrau. When you see a black object, the brain compares it to the surrounding to cancel this effect out to see true black.

The night sky is lit with stars and the moon, giving it a darker colour than eigengrau due to contrast, while retaining the blue hue produced by the dust diffracting light in a particular manner. Because of this, ninjas actually wore dark navy clothes instead of the black that we associate with them in the present.

An interesting point regarding darkness is that people often see it as a symbol of the negative side (e.g. The Dark Side). However, darkness is technically the opposite of light. It is in fact defined by the absence of light, which in other words suggests it is the default state.

The default state of the universe is nothing.

Posted in Science & Nature

Forecast

Posted on by Jinavie

When the weather forecast says today will be sunny, it always seems to rain (and vice versa). In fact, according to a US study, forecasts are sometimes less accurate than flipping a coin. If not even professionals can accurately predict the weather, can ordinary people like you and I do it?
The key to this is observation. By carefully studying your surroundings, you can look in to the future.

There are many signs before rain comes. For example, if the sunset is unusually clear or if a mountain far away looks smaller or hazy then it is very likely that it will rain the next day. If you see a rainbow in the morning it suggests rain is coming from the west. On hot days without any wind, it is likely there will be a heavy shower.
Animals are also adept at telling the weather. Frogs crying, worms coming out and swallows flying low are all signs that the air is humid and rain is coming. Swallows are especially accurate, as they fly low to catch insects that cannot fly high due to the humidity weighing them down.
If you are at the beach and there is a swarm of jellyfish, avoid going out to sea. Jellyfish near the coastline is a premonition for a storm.

If a more accurate weather prediction is required, the most precise method is cloud observation. If you study them carefully they comprise three tiers, with some clouds rising vertically.

Clouds in the highest level

  • Cirrus: Very fine, white feathery clouds that almost look combed over. If these clouds are curvy and organised the weather will be fine, but if they appear banded or spread chaotically they can gather and form rainclouds and start a shower.
  • Cirrostratus: Looks like a veil of cotton curtaining the sky. They cause halos around the sun and moon, which is a sign of imminent rain.
  • Cirrocumulus: Looks like a spread of seashells on a beach. If you find these clouds over a beach in winter, it will rain soon.

Clouds in the middle level

  • Altocumulus: Either appears as an ordered stream of rounded clouds, or looks like a herd of sheep. If these clouds shrink in size, the weather gets better (and vice versa).
  • Altostratus: Shaped like streaks of veil across the sky. They are often light grey or very dark. If they become thicker or sink to a lower level, it is a sign that the weather will be cloudy with a chance of rain.
  • Nimbostratus: The common “raincloud”, bringing rain and snow.

Clouds in the lowest level

  • Stratocumulus: Clumps of clouds that appear in layers without clear boundaries. You can see clear sky through gaps between them. If you can see clouds that were cumulus in the afternoon changing to stratocumulus by sunset, the weather will be great the next day.
  • Stratus: Looks like fog covering a low sky. If they come in the morning and disappear by night, that day will be clear. However, if they lie between altostratus and a canyon, it will rain.

Clouds that rise vertically

  • Cumulus: Fluffy clouds that you can see on a clear sky. If they disappear by evening the next day is clear, but if they can be seen late at night or float north-westerly, it is a sign that it will rain.
  • Cumulonimbus: Massive cloud pillars that rise to the level of cirrus. It always brings heavy rain and sometimes a thunderstorm.

If you know how to observe and analyse cloud patterns, you can predict the weather even when stranded on a desert island.

Posted in Science & Nature

Taste Of Water

Posted on by Jinavie

It is a common chemical fact that water is flavourless and odourless. However, most people will know that water “tastes” subtly different each time.
Taste is composed of information from taste buds on the tongue, combined with the sense of smell from your nose. Although water itself has no flavour or smell, it has many things dissolved in it such as gases and minerals that can be tasted.
This is why tap water can taste bad due to the chlorine used to treat it, or metals such as copper that have come off the pipes. 

It is also well known that temperature affects the taste of water. The ideal temperature is between 10~17°C, where oxygen saturation is sufficient, giving the water a “refreshing” taste. Any hotter and the oxygen escapes, giving the water a flat taste, just like distilled water. Warm water also causes the brain to think it is saliva or mucus, sometimes producing an uncomfortable sensation. Any colder, the tongue is numbed and it loses its ability to taste.

When making tea, the ideal temperature is 70~80°C. A simple way to achieve this is by leaving a cup of boiled water for a minute or two before putting the teabag in. This is the temperature when the dissolving of the various chemicals in tea leaves is optimal. If it is too hot, bitter-tasting tannins and catechins are released in excess, whereas if it is too cool, not enough dissolving occurs.

image

Posted in Science & Nature

Soul

Posted on by Jinavie

In 1907, a physician called Duncan MacDougall tried to scientifically prove the existence of the human soul. He weighed patients dying from tuberculosis at the time of death and studied the change in body mass. After observing the death of six patients, he noted that the body mass lightens at the time of death, which he attributed to the soul leaving the dead body. He published the official average mass of the soul as 21 grams.

Unfortunately, this experiment was complete nonsense. MacDougall failed to use the scientific method. The tiny sample size of six patients, the broad range of weight loss (21 was an arbitrary number he chose and was not even the proper mean mass) and the lack of control in the study environment are some of the major flaws of the experiment procedure. In fact, it is more likely the change in body mass was due to the many changes that occur post-mortem. For example, the lungs recoil and breathe out air, moisture escapes the body and as the sphincters relax, excrements are expelled.

Many people still believe the urban myth that the soul has an objective weight of 21 grams (possibly augmented by the movie 21 grams). Another interesting fact is that MacDougall also experimented on dogs (except instead of using dying dogs, he killed them himself). He found that dogs lose no weight when dying and thus claimed that dogs have no soul.

image

(Source: http://ericana.deviantart.com/art/Soul-Meets-Body-80831167?q=boost%3Apopular%20soul%20%20body%20-eater&qo=5)