A tornado is defined as a violently rotating column extending from a thunderstorm to the ground.The most violent tornadoes are capable of tremendous destruction with wind speeds of two hundred and fifty miles per hour or more.Damage paths can be more one mile wide and fifty miles long. In an average year,eight hundred tornadoes are reported nationwide,resulting in eighty deaths and over one thousand five injuries.
There arre many types of tornadoes.The average tornado is usually split up into categories based on the strength of the tornado.Most tornadoes,about 69%,are considered weak,which means they usually last between one minute and ten minutes,have winds less than one hundred and ten miles per hour, and the percent of deaths that occur during these is less than five percent. Strong tornadoes, about 29%, may last about twenty minutes, have winds between one hundred and ten and two hundred and five miles per hour, and the percent of deaths that are found are about thirty percent of all tornado deaths. The last category for tornadoes is violent ones. With these comes winds greater than two hundred and five miles per hour,they can last about an hour, and have seventy percent of all deaths from tornadoes.
Another type of tornado is known as a waterspout. This is a weak tornado that forms over warm water. They are most common along the Gulf Coast and southeastern states. In the western United States, they occur with cold late fall or late winter storms, during a time when you least except it to develop. They occasionally move inland becoming tornadoes that can cause a great deal of damage and many injuries.
...tornado was going to blow through the area you lived in. Tornadoes can be caused in different ways. Tornadoes usually have very negative effects. Joplin, Missouri’s progress was ruined because of the tornado. Tornadoes are violent storms that cause mass destruction.
Chiefly, there are different causes for a tornado. “An MCS is a cluster of thunderstorms that act as a system and often produce severe weather” (Bluestein). Many past thunderstorms formed super cells; super cells contained fast-spinning air called a mesocyclone. “The air that rises from the ground in the vortex creates low air pressure near the ground” (Bluestein). Many tornado-forming thunderstorms have formed in low-pressured areas. “You need warm, moist air from the Gulf of Mexico and cool, dry air from Canada. When these two air masses meet, they create instability in the atmosphere. A change in wind direction and an increase in wind speed with increasing height creates an invisible, horizontal spinning effect in the lower atmosphere” (WeatherWizKids). Chasing each other back and forth, the warm air and cool air make a spinning column.
In addition, the effects of tornadoes have been very damaging. “An EF5 tornado can remove a house from its foundation” (Bluestein). EF5 tornadoes are the strongest tornadoes on the Fujita scale. Tornadoes have caused great damage to...
Tornadoes in affect around the World
A tornado is a violently rotating column of air pendant from a cumulonimbus cloud, and nearly always observable as a "funnel cloud" or tuba. Each year, around 1000 tornadoes move through the U.S, but only about 2% of them reach either F4 F5 status on the fujita scale. Most tornadoes are not strong, especially occurring in country like areas and doing little to no damage. Sometornadoes, however, are much strong, and can damage their way through major metropolitan area or through an entire small town. These tornadoes usually strike without warning and the destruction can be remembered for years. Here is an idea of 5 different deadliest tornadoes in the U.S History; the Tri State tornado, the Waco tornado, the Natchez tornado, the Tupelo tornado, the Gainesville tornado.
One of the worst tornados in U.S history passed through Indiana, Illinois, and Missouri, killing 695 people, injuring some 13,000 people, and causing 17 million in property damage. The Tri-state tornado traveled 219 miles, spent more than three hours on the ground, and traveled at a speed of 70mph. More than 500 of the total 695 people who perished were killed in southern Illinois, including 234 in Murphysboro and 127 in West Frankfort.
The second deadly tornado is Waco Texas Tornado; there were 114 people who died in the Waco area that day...
...left behind little evidence of their existence. The stromatolite evidence found, dating back to this era, suggest that a consortia of species with diverse metabolic needs existed and competed over resources under hostile conditions, forming the fossils we observe today.
4) What are the main features that are shared by the Solar System's four giant (or jovian) planets? (150 words, 3 marks)
The four jovian planets are Jupiter, Saturn, Neptune and Uranus. Similarities of Jovian planets include that:
1) Jupiter and Saturn are mainly composed of hydrogen and helium
2) Neptune and Uranus are mainly composed of water, ammonia and methane
3) These planets all have less density compared to the terrestrial planets
4) These planets all have strong magnetic field due to their high speed of rotation
5) These planets all have low temperatures as they are farther away from the sun
6) The mass of all of these planets is more than 10 times the mass of the Earth
7) These planets all have small cores compared to the terrestrial planets
8) Gas storms are a common phenomenon on the surface of all of the jovian planets
9) The rings of all of the jovian planets are not solid but are made up of particles moving around the planet
5) Observations of Saturn's small moon Enceladus by the Cassini spacecraft have led to great interest in this object. What has Cassini discovered and why is the discovery so important? (120 words, 3 marks)
Cassini is a NASA project...
...Are tornadoes becoming more frequent and more violent because of climate change?
A powerful tornado as much As 3 kilometres wide devastated the Oklahoma City suburb of Moore on May 20. The tornado reportedly boasted winds above 300 kilometres per hour as it ripped through homes and schools, leaving a huge path of destruction and fifty one of people, including twenty children. People have started to ask the questions about what causes these shatteringtornadoes, and a lot of people have started to ask if we are to play for these severe tornadoes because of human induced climate change.
Trying to establish whether tornado activity will change as the climate changes is complicated for a few reasons. Firstly scientists don’t have a good quality, complete data set on tornadoes that have already occurred. Without a reliable record, scientist can’t accurately look to see how tornadoes have changed since temperatures started rising. Secondly, computer simulated models can’t tell scientists much about tornadoes either. Because these models work on large scales, simulating changes in the ocean and the atmosphere on a global scale. In contrast, tornadoes are minor weather events. As Dr Suzanne Gray, a meteorologist from Reading University explains:
"Tornadoes are too small-scale for current climate models to simulate, so it is not possible...
The different between English and Arabic letters
The Instructor Name: Wael Abdeen
Phonetics is: concerned with describing speech.
All the letters in the alphabet symbolize either vowels or consonant. Vowels have no contact made when spoken.
* There are only five letters used to write vowels in English. They stand for about 20 vowel sounds in most English accents, so these letters are a source of ambiguity in pronunciation for educated people. These letters are vowels:
(A, I, E, O, and U ) .
In all vowels, the mouth passage is unobstructed, and all of them are voiced.
The (w,y) is considered as semi vowels
Letters | Place of articulation | Manner of articulation | Examples |
j | Palatal | Glide | Yellow |
W | Bilabial | Glide | Way |
However, in Arabic language there are two kinds of vowels, (long, and short vowels) on one hand, long vowels are:
Letters | Place of articulation | Manner of articulation | Examples |
ا | Glottal | Fricative | إنسان |
و | Bilabial | Glide | ورده |
ي | Palatal | glide | يوم |
On anther hands short vowels are: (فتحه,كسره,ضمه,شده, سكون,(مد.
Below is a table summarizing the short vowel
Sign | Name | Sound |
بَ | فتحه | a |
بِ | كسره | i |
بُ | ضمه | u |
بّ | شده | We can make the letter twice |
بْ | سكون | The sound still same |
آ | مد | prolongs the <a>-sound of the nayef |
*consonant in English: if it is...
...Academy for Young Writers
SBO Schedule Proposal
2012-2013 School Year
SBO: School-Based Option (Article 8B)
An SBO is the process whereby the Principal and the UFT Chapter Leader agree to propose to the UFT represented school staff deviations from certain requirements of the various UFT contracts, such as staffing, class size, rotation, etc. In order pass a vote, the proposal must be approved by fifty-five percent (55%) of the staff who vote and the SBO must specify which provisions of the contract will be altered.
Contract Information | SBO Proposal #1 | Vote : Circle One |
School Day (Article 6A1,2,3) 1. The school day for teachers shall be 6 hours and 20 minutes and such additional time as provided for below.2. The parties agreed to extend the teacher work day in “non Extended Time Schools” by an additional 37 ½ minutes per day, Monday through Thursday, following student dismissal. Friday’s work schedule is 6 hours and 20 minutes. The 37 ½ minutes of the extended four (4) days per week shall be used for tutorials, test preparation and / or small group instruction and will have a teacher to student ratio of no more than one to ten. In single session schools, the day will start no earlier than 8:00 A.M. and end no later than 3:45 P.M. | The schedule for the 2012-2013 school year will be as follows:Monday: Start time is 8:55. End time is 3:31.Total time is 6 hrs 36min.Tuesday: Start time is 8:55 End time is 3:31Total time is 6 hrs 36 min.Wed.: Start time is...
Wind Power Operated Eco-Friendly Bike
Availability of energy, its source and cost have become key points in development over the
last couple of decades. Ever rising demand and consumption of conventional fueled
energies despite fast depletion of the resources have encouraged development of green
energy sources. Green energy technologies are modern day solutions to the problems of
conventional energy generation. Wind power, as an alternative to fossil fuels, is plentiful,
renewable, widely distributed, clean, produces no greenhouse gas emissions during
operation. In this direction our project is focused on use of wind power for driving the motor
bike. Our objectives of the project are:•To effectively design the Wind Mill rotor blades
such that maximum power from the wind is extracted.•To successfully design the electromechanical system comprising alternator, battery and inverter to store the wind energy in
the form of electricity.•To develop a cost efficient, eco-friendly and user friendly bike for all
ages.•We would like to involve the user group to evaluate the effectiveness of our...
... Tornadoes vs. Hurricanes
Hurricanes and tornadoes are both very serious, strong forces of nature that can be extremely destructive and devastating. They are of the most violent natural catastrophes ever, and both can cause great damage with their overwhelming windstorms. They both consist of very heavy rain and winds and have unusually high wind-speeds. Although they seem a lot alike and very similar, they have many differences. Hurricanes and tornadoes are both stormy atmospheric systems that can cause great destruction, but they differ in length, speed and intensity, and climatic influences.
Tornadoes have diameters on the scale of the 100’s of meters and are produced by a single storm, such as a thunderstorm or a cumulonimbus. The diameter of a tornado’s eye is only a few feet in diameter, while the diameter of a hurricane’s eye is 10-20 miles. Because tornadoes move rapidly, they could cause more damage than their size might suggest. A hurricane, or a tropical cyclone, has a diameter on the scale of 100s of kilometers and is made up of many storms. The average hurricane is 322-483 kilometers in diameter and really big hurricanes can span 1,127 kilometers. The size of a hurricane is not directly related to its wind speed or force. Small ones can be extremely strong, while big ones can be relatively...