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Eugenio Ferrara

The Mariners' Museum | EXPLORATION through the AGES - 0 views

  • d. He had brothers, Thorvald and Thorstein, and a half-sister, Freydis. In the year 999 BCE, Ericsson sailed to Norway to visit King Olaf Trygvson. On his way the ship was blown off course and he landed on one of the Hebrides islands. Continuing poor weather made it impossible for him to leave so he spent the summer on the island.
  • . She gave birth to his son and as his departure date drew near, she asked that he take her with him. He refused, citing her family connections. Thorgunna had a reputation for being able to predict the future, and vowed that even though Leif was leaving them, one day she and their son would journey to find him and the experience would not be a good one.
  • , while other sources claim that when the boy was old enough to travel, he found Leif.
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  • What is known for certain is that Leif and the boy eventually found each other and the young man was recognized as his son.
  • Nevertheless, Leif left the island and got to Norway by the fall. King Olaf welcomed him to his court and asked if Leif had plans for a voyage to Greenland. The king had recently been converted to Christianity and wanted Leif to proclaim Christianity to the Norse settlers living in Greenland, including his parents. He returned to Greenland, and as the king wished, spread the message of Christianity. Leif’s mother, Thjodhild, quickly adopted the new religion, but his father, Eric, was reluctant to give up his pagan beliefs. Only when Thjodhild refused to live with
  • him as man and wife, did Eric the Red finally convert to Christianity.
  • Leif Eiriksson’s exploration and discovery of America was inspired by the accidental voyage of Bjarni Herjulfson.
  • As a skilled sailor and trader, Herjulfson had devoted himself to going on trading voyages from Iceland every other year
  • In 1002 BCE, Leif Eiriksson decided to explore the unknown lands discovered by Herjulfson while on the quest for his father.
  • Leif bought a ship from Bjarni and gathered a crew of thirty-five men.
  • Eric, his father, was approached about being the expedition leader. A fall from a horse prior to embarking convinced Eric that he would be unlucky on the voyage and that he was too old to set off on another adventure. Leif himself took command and the ship and crew departed.
  • The first country Leif encountered was the last one Herjulfson had seen. It was barren, with glacier-topped mountains and vast stretches of rock-covered ground
  • Initiating the practice of naming the lands he found after their geological and physical traits, he called this area Helluland, or “land of flat rocks.” (Labrador)
  • The second country Leif sailed to was level and wooded, with deep white beaches and a sloping shoreline. He called this place Markland (Newfoundland) or “forest land.” Leaving there, he sailed northeast. He found an island north of the mainland. He and his crew sailed the channel between the island and mainland and steered west. When they found land they went ashore, discovering a small river that flowed to the sea. They returned, took the ship up the river to a lake where they decided to build houses, and stayed through the winter.
  • The area had salmon in the river and lake; the winter was mild and almost frost-free, and the grass did not wither during the cold season.
  • The hours of daylight and nighttime were more equally divided than in either Iceland or Greenland
  • Leif divided his crew in half, determined to explore the area. Half would stay in camp while the other half went as a group to investigate the surroundings. The exploration crew was to go no further than the distance they could travel in order to return to camp by nightfall.
  • to explore the area. Half would stay in camp while the other half went as a group to investigate the surroundings. The exploration crew was to go no further than the distance they could travel in order to return to camp by nightfall.
marino5856

The First Voyage of Christopher Columbus (1492-1493) - 0 views

  • On December 25, the Santa María ran aground and had to be abandoned. Columbus himself took over as captain of the Niña, as the Pinta had become separated from the other two ships. Negotiating with the local chieftain Guacanagari, Columbus arranged to leave 39 of his men behind in a small settlement, named La Navidad.
  • Leaving Cuba, Columbus made landfall on the Island of Hispaniola on December 5. The natives called it Haití, but Columbus renamed it La Española, a name which was later changed to Hispaniola when Latin texts were written about the discovery.
  • Second landfall: Cuba:
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  • First landfall: San Salvador:
  • The First Voyage of Christopher Columbus:
  • The land turned out to be a small island in the present-day Bahamas.
  • Columbus named the island San Salvador, although he remarked in his journal that the natives referred to it as Guanahani. There is some debate over which island was Columbus’ first stop; most experts believe it to be San Salvador, Samana Cay, Plana Cays or Grand Turk Island.
  • Pinta, first sighted land. Columbus himself later claimed that he had seen a sort of light or aura before Triana did, allowing him to keep the reward he had promised to give whomever spotted land first.
  • On October 12, Rodrigo de Triana, a sailor aboard the
marino5856

Why are there 24 hours in a day? › Ask an Expert (ABC Science) - 0 views

  • "The origin of our time system of 24 hours in a day with each hour subdivided into 60 minutes and then 60 seconds is complex and interesting," says Dr Nick Lomb, consultant curator of astronomy, from the Sydney Observatory.
  • Our 24-hour day comes from the ancient Egyptians who divided day-time into 10 hours they measured with devices such as shadow clocks, and added a twilight hour at the beginning and another one at the end of the day-time, says Lomb.
  • "Night-time was divided in 12 hours, based on the observations of stars. The Egyptians had a system of 36 star groups called 'decans' — chosen so that on any night one decan rose 40 minutes after the previous one.
    • marino5856
       
      The 24 hours has been invented by the egyptians. They first divided it into 10 hours but then they divided it in 12 because of the twilight. So night time was divide in 12 hours because they wanted to see the stars in the night and also that there would be light in the day.
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  • The subdivision of hours and minutes into 60 comes from the ancient Babylonians who had a predilection for using numbers to the base 60. For example, III II (using slightly different strokes) meant three times 60 plus two or 182.
  • "We have retained from the Babylonians not only hours and minutes divided into 60, but also their division of a circle into 360 parts or degrees," says Lomb.
  • While each country has (in broad terms) historically had distinct measurements for distance, weights etc the method of splitting the day into 24 hours, one hour into 60 mins and one minute into 60 seconds seems to be the only one in use, and indeed to me the only one I know of. This non-metric measurement of time is far from ideal, but what other comparably accurate methods have been used historically?
marino5856

Clocks - How Time Works - 1 views

  • A day consists of two 12-hour periods, for a total of 24 hours. An hour consists of 60 minutes. A minute consists of 60 seconds. Seconds are subdivided on a decimal system into things like "hundredths of a second" or "millionths of a second."
    • marino5856
       
      There is 24 hours in a day because  they first divided 60 and that equals 12. So 12 plus 12 equals 24 so thats how they had 24 hours in a day.
  • hat's a pretty bizarre way to divide a day up. We divide it in half, then divide the halves by twelfths, then divide the twelfths into sixtieths, then divide by 60 again, and then convert to a decimal system for the smallest increments. It's no wonder children have trouble learning how to tell time.
  • How long is a day? It's the amount of time it takes for the Earth to rotate one time on its axis. But how long does it take the Earth to rotate? That is where things become completely arbitrary. The world has decided to standardize on the following increments:
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  • Why are there 24 hours in a day? No one really knows. However, the tradition goes back a long way. Take, for example, this quote from Encyclopedia Britannica:
  • Why are there 60 minutes in an hour and 60 seconds in a minute? Again, it is unclear. It is known, however, that Egyptians once used a calendar that had 12 30-day months, giving them 360 days. This is believed to be the reason why we now divide circles into 360 degrees. Dividing 360 by 6 gives you 60, and 60 is also a base number in the Babylonian math system.
    • marino5856
       
      The Egyptians had a calendar that has 12 months so that equals 360 day in total. Also science they new that there is 360 days in a year thats why a circle is 360 degrees. The Roman people invented that so that in the clock there is not 24 hours in a clock so there is 12 am and 12pm.
  • What do a.m. and p.m. mean? These abbreviations stand for ante meridiem, before midday, and post meridiem, after midday, and they are a Roman invention. According to Daniel Boorstin in his book The Discoverers, this simple division of the day into two parts was the Romans' first increment of time within a day:
marino5856

Christopher Columbus Discovers America, 1492 - 0 views

  • Columbus led his three ships - the Nina, the Pinta and the Santa Maria - out of the Spanish port of Palos on August 3, 1492. His objective was to sail west until
  • he reached Asia (the Indies) where the riches of gold, pearls and spice awaited. His first stop was the Canary Islands where the lack of wind left his expedition becalmed until September 6.
    • marino5856
       
      Christopher Columbus started his first trip was in 1492
    • marino5856
       
      His goal was to sail the west until he reached the Indies because he wanted goal he thought that his first stop was inCanary Islands were he stayed there until september 6
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  • Once underway, Columbus benefited from calm seas and steady winds that pushed him steadily westward (Columbus had discovered the southern "Trades" that in the future would fuel the sailing ships carrying goods to the New World). However, the trip was long, longer than anticipated by either Columbus or his crew. In order to mollify his crew's apprehensions, Columbus kept two sets of logs: one showing the true distance traveled each day and one showing a lesser distance. The first log was kept secret. The latter log quieted the crew's anxiety by under-reporting the true distance they had traveled from their homeland.
trevino5824

Pesadillas - 0 views

  • Es importante destacar que casi todas las pesadillas recurrentes intentan dar un servicio importante al soñador. Si, al tener una pesadilla, nuestra reacción es intentar olvidarla cuánto antes, entonces perdemos una ocasión para aprender de ellas y no haremos caso al mensaje que nos intentan transmitir. Si sufre de pesadillas recurrentes y quiere saber más sobre cómo controlarlas, pincha
    • trevino5824
       
      you want to take out your nightmares because then you need to dream of that and sometimes you need to repeat your dream that you had the last night you had that dream
Diego Hinojosa

Venus -- Britannica School - 0 views

  • The second planet from the Sun is Venus. After the Moon, Venus is the most brilliant natural object in the nighttime sky. It is the closest planet to Earth, and it is also the most similar to Earth in size, mass, volume, and density. These similarities suggest that the two planets may have had similar histories. Scientists are thus intrigued by the question of why Venus and Earth are now so different.
    • Diego Hinojosa
       
      Venus is the second closest planet to the sun.It is really similar to earth and also it is the planet most close to earth. The earth and venus are really similar on size and also atmosphere.
Esteban Cantu

What Is Jupiter? | NASA - 0 views

  • Jupiter is like a star in composition. If Jupiter had been about 80 times more massive, it would have become a star rather than a planet.
lobo5879

instaGrok - 0 views

  • Nightmares tend to happen during the second half of a night's sleep, when REM intervals are longer. [source]
  • Nightmares are rarely prescriptive, meaning they are not signs that something bad will happen.
  • Nightmares are frightening dreams that usually awaken the sleeper from REM sleep. [source]
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  • Nightmares can reveal fears that are keeping you from moving forward. [source]
  • Nightmares tend to occur after several hours of sleep, screaming or moving about is very uncommon, the dream is usually elaborate and intense, and the dreamer realizes soon after wakening that he or she has had a dream. [source]
lopez5891

Secret Language of Dolphins - 0 views

  • Here's a conversation worth talking about: A mother dolphin chats with her baby…over the telephone! The special call was made in an aquarium in Hawaii, where the mother and her two-year-old calf swam in separate tanks connected by a special underwater audio link. The two dolphins began squawking and chirping to each other—distinctive dolphin chatter.
    • lopez5891
       
      In National Geographic Kids, it said that two Dolphins were talking on a telephone! There was two different tanks, and there was an audio link in each one. And they were making sounds, and chirping and squeaking. The baby had 2 years.
    • lopez5891
       
      In National Geographic they said that, two Dolphins were talking on the telephone! There were 2 tanks, on one there was a calf (baby Dolphin) of 2 years. And in the other there was the mother. There was an audio link connecting both the mother and the baby. And they were chirping, and squeaking. And they realized that they were talking to each other.
marino5856

Curious About Astronomy: Why is a day divided into 24 hours? - 0 views

  • December 2003 answer: It appears that the Egyptians were responsible for the 24 hour day. The Eqyptians were fond of counting in base twelve (instead of base 10 which is commonly used today). This is thought to be because they counted finger joints instead of fingers. Each of your fingers has three joints, so if you count by pointing to finger joints with your thumb you can count to twelve on each hand. This might seem arbitrary, but is actually just a strange as counting in base ten simply because we have ten digits.
    • marino5856
       
      The egyptians were the ones that were in charge of the 24 hours in a day because they had a system so they found  a counting base in twelve.
  • The Egyptians divided the clock into 12 hours of daytime and 12 hours of night-time (or alternatively 10 hours between sunrise and sunset, an hour for each twilight period and 12 hours of darkness). This is known because of various sundials from the period which have been found to be marked with hours. Interestingly this means that hours started out changing in length with the seasons (as the amount of daylight vs. darkness changes).
    • marino5856
       
      they divided the clock in 12 hours because 12 in the night and about 10 in the sunrise that it became 12hours so that it is equal.
    • marino5856
       
      The egyptians divided the clock into 12 hours. 1,2,3,4,5,6,7,8,9,10,11,12 a.m and 1.2.3.4.5.6.7.8.9.10.11.12 p.m so that all the p.m could see the stars and the a.m the sunrise. Like there are 12 a.m and 12 p.m so 12 plus 12 equals24 thats why we have 24 hours in a day.
trevino5824

Common Questions About Nightmares - International Association for the Study of Dreams - 0 views

    • trevino5824
       
      The dreamer who is dreaming bad things dream bad things and they feel anger guilty and depreesion
  • Nightmares tend to occur after several hours of sleep, screaming or moving about is very uncommon, the dream is
    • trevino5824
       
      The nightmares happen a lot it is very usual that you move a lot or scream in several hours 
  • usually elaborate and intense, and the dreamer realizes soon after wakening that he or she has had a dream.
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  • Children who have night terrors also may have a tendency to sleepwalk and/or urinate in bed.
    • trevino5824
       
      children who have bad nightmares sleepwalk a lot or urinate on your bed and when they hqave nightmares they stop and wake up sometimes
  • The causes of night terrors are not well understood. Children usually stop having them by puberty.
marino5856

Why is a minute divided into 60 seconds, an hour into 60 minutes, yet there are only 24... - 0 views

  • Thanks to documented evidence of the Egyptians' use of sundials, most historians credit them with being the first civilization to divide the day into smaller parts. The first sundials were simply stakes placed in the ground that indicated time by the length and direction of the resulting shadow. As early as 1500 B.C., the Egyptians had developed a more advanced sundial.
    • marino5856
       
      Thanks to the duodecimal system. The  egyptians used the system to make counting more easier. Also the number 12 is typically attributed.
  • A T-shaped bar placed in the ground, this instrument was calibrated to divide the interval between sunrise and sunset into 12 parts. This division reflected Egypt's use of the duodecimal system--the importance of the number 12 is typically attributed either to the fact that it equals the number of lunar cycles in a year or the number of finger joints on each hand (three in each of the four fingers, excluding the thumb), making it possible to count to 12 with the thumb.
  • The next-generation sundial likely formed the first representation of what we now call the hour. Although the hours within a given day were approximately equal, their lengths varied during the year, with summer hours being much longer than winter hours
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  • Egyptian astronomers also first observed a set of 36 stars that divided the circle of the heavens into equal parts. The passage of night could be marked by the appearance of 18 of these stars, three of which were assigned to each of the two twilight periods when the stars were difficult to view. The period of total darkness was marked by the remaining 12 stars, again resulting in 12 divisions of night (another nod to the duodecimal system).
    • marino5856
       
      Egyptians noticed that there was 36 stars in each part so they divided that into equal parts 12.
morales5853

The Mariners' Museum | EXPLORATION through the AGES - 0 views

  • Lead Line
    • morales5853
       
      The lead line was a tool used for measuring the speed a boat was going. This tool worked by a long rope that had many knots made on it and a man garbed it and checked how many knots fell overboard and how fast.
Isabel Herrera

Taste, Information about Taste - 0 views

  • An individual's unique sense of taste is partially inherited, but factors such as culture and familiarity can help determine why one person's favorite food made be hot and spicy while another just can't get enough chocolate.
    • Isabel Herrera
       
      Taste can also depend on your culture or family traditions and that's why some people love spicy food while other people hate it and prefer chocolate instead.
  • Taste occurs when specific proteins in the food bind to receptors on the taste buds.
    • Isabel Herrera
       
      Taste can happen when the protein in the food your eating joins with the receptors in your taste buds.
  • Taste buds for all four taste groups can be found throughout the mouth, but specific kinds of buds are clustered together in certain areas. Think about licking an ice cream cone; taste buds for sweetness are grouped on the tip of our tongue. The buds for sour tastes are on the sides of the tongue and saltyon the front.
    • Isabel Herrera
       
      The taste buds for all "four taste groups" are usually placed all over the mouth, but taste buds for specific kinds are found in a little group somewhere in the mouth. For example, the taste buds for sweetness can be found in a tiny group in the tip of your tongue. The taste buds for sour are found on the sides.
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  • People constantly regenerate new taste buds every 3-10 days to replace the ones worn out by scalding soup, frozen yogurt, and the like. Unfortunately, aspeople grow older, their taste buds lose their fine tuning because they are replaced at a slower rate.
    • Isabel Herrera
       
      A lot of people change taste buds every 3-10 days to avoid the taste buds that had been used for hot soup and frozen yogurt. But as people grow older their taste buds starts losing their ability to taste that's why they're replaced.
  • (The number of taste buds varies in different animal species. For example, cows have 25,000 taste buds, rabbits 17,000, and adult people approximately 10,000.)
    • Isabel Herrera
       
      Different animals have different amount's of taste buds, Fore example cows have 24,000 taste buds, rabbits have 17,000 taste buds and adult people have 10,000 taste buds.
garza6544

How are rainbows made? - 0 views

  • The birth of each rainbow begins with millions of tiny rain droplets.  The rain droplets serve as a type of reflector of light.  White light enters one individual rain droplet and exits as one specific color of the spectrum.  Without millions of rain droplets, a rainbow would not occur.  If you only had a few rain droplets you would only see a few colors.  This is typically why rainbow appear after a rain storm
  • Each rain droplet has a function in the formation of the rainbow. Sunlight enters the rain droplet at a specific angle and the rain droplet separates the white light into many different colors.  This angle is a fixed measurement between your eye
  • and the sun.  What color is refracted depends upon the critical angle,                   which is the angle the sunlight strikes the back of the rain droplet.  Red light bends the least, exiting the rain droplet at a 42 degree angle, while Violet light bends the most, exiting the rain droplet at a 40 degree angle.  All of the other colors of the rainbow exit the rain droplets at some angle between 40 and 42 degrees, thus making up the colors of the rainbow ROYGBIV, this order never changes.
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  • Each rain droplet reflects all colors at a given point and time, but only one color comes back to your eye, requiring million of rain droplets to create a rainbow.  As the rain droplets fall through the sky, the colors of the spectrum being reflected and refracted are constantly changing.
  • The perfect time and place to look for a rainbow you need bright sunlight to your back and rain clouds off in the distance in the direction of your shadow. If it is later than 4:30 in the afternoon or earlier than 8:30 in the morning at these condition there is a very good chance you will be able to see a rainbow in the sky.  Other places you may see rainbows formed are fountains, in the ocean as the waves crash against the rock which create a mist in the air, waterfalls, sprinklers and mist from a garden hose. Always remember to have the sun at your back to see a rainbow, happy rainbow hunting!!!!!!
  • Rainbows form a complete circle, however only half is visible.  The horizon only  Picture from the web site of the Department of Physics and Astronomy, Arizona State University                                                             allows us to see half of the rainbow circle, so we see just an arc.  What causes the rainbow to have a circular formation is the way that rain droplets fall.  The rain droplets do not fall is flat sheet, however they tend to fall at various distances and speeds.  On some occasions you can see a full circle around a garden hose.
    • garza6544
       
      each rainbow is made by millions of rain droplets. the rain droplets make a reflect of light and it makes different colors. While light comes in a specific Droplet then it makes a specific color. Without milions and milions of rain droplets the rainbow cant be formed. If you only have a few rain droplets then you will only see a few colors. This is the reason why they happen after a rain storm.
  • function
    • garza6544
       
      Each rain droplet that rains  is always useful to make a rainbow because every rainbow needs to do something different to make a rainbow. The rain droplets separates the light into different colors.
lobo5879

Your Eyes - 0 views

  • Your eyes are at work from the moment you wake up to the moment you close them to go to sleep. They take in tons of information about the world around you — shapes, colors, movements, and more. Then they send the information to your brain for processing so the brain knows what's going on outside of your body.
    • guzman5862
       
      Did you know That without your eyes you maybe will not feel good inside you because with your eyes you have seen all the beutifle things that you had seen in your life but they are opened for all the time exept for when you sleep and blink.
  •  
    Your eyes are at work from the moment you wake up to the moment you close them to go to sleep. They take in tons of information about the world around you - shapes, colors, movements, and more. Then they send the information to your brain for processing so the brain knows what's going on outside of your body.
marino5856

Why is the ocean salty and rivers are not? - 1 views

shared by marino5856 on 03 Dec 14 - No Cached
    • marino5856
       
      Fresh wateris fromed becuase like the sea water evaporates in the atmosphere the water that it had is left behind. When it rains or snow it gives fresh water such as rivers, and lakes
guzman5862

Automobile safety - Wikipedia, the free encyclopedia - 0 views

  • Automobile safety is the study and practice of design, construction, equipment and regulation to minimize the occurrence and consequences of automobile accidents. Road traffic safety more broadly includes roadway design. One of the first formal academic studies into improving vehicle safety was by Cornell Aeronautical Labs of Buffalo, New York. The main conclusion of their extensive report is the crucial importance of seat belts and padded dashboards.[1] However, the primary vector of traffic-related deaths and injuries is the disproportionate mass and velocity of an automobile compared to that of the predominant victim, the pedestrian.[citation needed] In the United States a pedestrian is injured by an automobile every 8 minutes, and are 1.5 times more likely than a vehicle's occupants to be killed in an automobile crash per outing.[2]
    • guzman5862
       
      In the cars you need to be safe and they are made like that for a reason so that you are safe and for the system inside the car is safe. A lot of persons have been dead for the cause of trafic because they get too much desperate that they try to go fast but they crash, thats why they had decided to make sit belts. The system inside the car is really little and thats why the car has a lot of things around it and the car is made like that for a reason like an oval so that they crash them with the car is suposed to not happen anything. 
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