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Flourishing along the hot Gulf Coast of Mexico from about 1200 to about 400 BCE, the Olmec produced a number of major works of art, architecture, pottery, and sculpture. Most recognizable are their giant head sculptures ( [link] ) and the pyramid in La Venta. The Olmec built aqueducts to transport water into their cities and irrigate their fields. They grew maize, squash, beans, and tomatoes. They also bred small domesticated dogs which, along with fish, provided their protein. Although no one knows what happened to the Olmec after about 400 BCE, in part because the jungle reclaimed many of their cities, their culture was the base upon which the Maya and the Aztec built. It was the Olmec who worshipped a rain god, a maize god, and the feathered serpent so important in the future pantheons of the Aztecs (who called him Quetzalcoatl) and the Maya (to whom he was Kukulkan). The Olmec also developed a system of trade throughout Mesoamerica, giving rise to an elite class.

A photograph shows a massive carved stone head with a flat nose, large lips, and slightly crossed eyes.
The Olmec carved heads from giant boulders that ranged from four to eleven feet in height and could weigh up to fifty tons. All these figures have flat noses, slightly crossed eyes, and large lips. These physical features can be seen today in some of the peoples indigenous to the area.

The maya

After the decline of the Olmec, a city rose in the fertile central highlands of Mesoamerica. One of the largest population centers in pre-Columbian America and home to more than 100,000 people at its height in about 500 CE, Teotihuacan was located about thirty miles northeast of modern Mexico City. The ethnicity of this settlement’s inhabitants is debated; some scholars believe it was a multiethnic city. Large-scale agriculture and the resultant abundance of food allowed time for people to develop special trades and skills other than farming. Builders constructed over twenty-two hundred apartment compounds for multiple families, as well as more than a hundred temples. Among these were the Pyramid of the Sun (which is two hundred feet high) and the Pyramid of the Moon (one hundred and fifty feet high). Near the Temple of the Feathered Serpent, graves have been uncovered that suggest humans were sacrificed for religious purposes. The city was also the center for trade, which extended to settlements on Mesoamerica’s Gulf Coast.

The Maya were one Mesoamerican culture that had strong ties to Teotihuacan. The Maya’s architectural and mathematical contributions were significant. Flourishing from roughly 2000 BCE to 900 CE in what is now Mexico, Belize, Honduras, and Guatemala, the Maya perfected the calendar and written language the Olmec had begun. They devised a written mathematical system to record crop yields and the size of the population, and to assist in trade. Surrounded by farms relying on primitive agriculture, they built the city-states of Copan, Tikal, and Chichen Itza along their major trade routes, as well as temples, statues of gods, pyramids, and astronomical observatories ( [link] ). However, because of poor soil and a drought that lasted nearly two centuries, their civilization declined by about 900 CE and they abandoned their large population centers.

Questions & Answers

Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
What is specific heat capacity
Destiny Reply
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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Source:  OpenStax, U.s. history. OpenStax CNX. Jan 12, 2015 Download for free at http://legacy.cnx.org/content/col11740/1.3
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