Edurete.org

Vectors and Direction
A vector quantity is a quantity which is fully described by both magnitude and direction.
Examples of vector quantities include displacement, velocity, acceleration, and force. Each of these quantities are unique in that a full description of the quantity demands that both a magnitude and a direction are listed.

Segnalato da: Sabrina Pastorelli
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http://www.glenbrook.k12.il.us/gbssci/Phys/Class/vectors/u3l1a.html

Acidi Grassi
Descrizione generale del percorso
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http://www.edurete.org/public/upload/generalità.htm

Forces in General
Forces are vectors. That is, they are quantities that have both size and direction. Forces can be symbolized with arrows, as can all vectors. In the metric system forces are measured in units of Newtons.
Segnalato da: Sabrina Pastorelli
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http://id.mind.net/~zona/mstm/physics/mechanics/forces/forcesInGeneral/forcesInGeneral.html

Force
In physics, force is what causes a mass to accelerate. It may be experienced as a twist, a push, or a pull. The acceleration of a body is proportional to the vector sum of all forces acting on it. The concept of force has been used in statics and dynamics since ancient times.
Segnalato da: Sabrina Pastorelli
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http://en.wikipedia.org/wiki/Force

THE EQUATION OF A STRAIGHT LINE
Lines in a Cartesian plane can be described algebraically by linear equations and linear functions. In two dimensions, the characteristic equation is often given by the slope-intercept form:y=ax+b.

Segnalato da: Sabrina Pastorelli
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http://www.themathpage.com/alg/equation-of-a-line.htm#solution

Equation of a Straight Line
The GENERAL equation of a straight line is given in the form:
y = mx + b.

Segnalato da: Luisa Demonte Barbera
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http://www.mathsisfun.com/equation_of_line.html

Grafico moto circolare uniforme
Grafico moto circolare uniforme
Segnalato da: Luisa Demonte Barbera
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http://www.edurete.org/public/upload/STV_Moto_circolare_uniforme.JPG

Vector Addition
This applet should be useful in picking up vector addition and subtraction. You draw two vectors of your choice, choose the operation (Add or Subtract) and arrange the two vectors in a certain manner by dragging them. Drawing is done by pressing the mouse button at some point and dragging and releasing it at another point. If you watch the display you would see it updating giving the details of the vector that you are drawing. Once you have two vectors on the drawing space any one of them can be moved. Press the mouse button with cursor positioned on the dot at the midpoint of the vector and drag it. This will help you to reposition the vector parallel to itself.

Segnalato da: Luisa Demonte Barbera
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http://www.surendranath.org/Applets/Math/VectorAddition/VectorAdditionApplet.html

Vectors - Fundamentals and Operations
Any vector directed in two dimensions can be thought of as having an influence in two different directions. That is, it can be thought of as having two parts. Each part of a two-dimensional vector is known as a component. The components of a vector depict the influence of that vector in a given direction. The combined influence of the two components is equivalent to the influence of the single two-dimensional vector. The single two-dimensional vector could be replaced by the two components.

Segnalato da: Luisa Demonte Barbera
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http://www.glenbrook.k12.il.us/gbssci/Phys/Class/vectors/u3l1d.html

minerali e rocce
elementi introduttivi di mineralogia e petrografia; un apresentazione in ppt abbastanza completa
Segnalato da: stefano quadro
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http://www.silsis.unimi.it/SILSISMI/Indirizzi/Indirizzi_doc/Scienze%20Naturali/minerali%20e%20rocce.ppt

le rocce sedimentarie
il processo sedimentario e la classificazione delle rocce sedimentarie; una pagina alla portata di studente di scuola superiore
Segnalato da: stefano quadro
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http://www.icvbc.cnr.it/didattica/petrografia/5.htm

Motion in one dimension
We live in a 3-dimensional world, so why bother analyzing 1-dimensional situations? Basically, because any translational (straight-line, as opposed to rotational) motion problem can be separated into one or more 1-dimensional problems. Problems are often analyzed this way in physics; a complex problem can often be reduced to a series of simpler problems.

The first step in solving a problem is to set up a coordinate system. This defines an origin (a starting point) as well as positive and negative directions. We'll also need to distinguish between scalars and vectors. A scalar is something that has only a magnitude, like area or temperature, while a vector has both a magnitude and a direction, like displacement or velocity.

Segnalato da: Luisa Demonte Barbera
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http://physics.bu.edu/~duffy/py105/Motion1D.html

LA CLASSIFICAZIONE DELLE ROCCE
una pagina web sulla classificazione delle rocce sedimentarie, magmatiche e metamorfiche
Segnalato da: stefano quadro
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http://www.arch.unige.it/sla/geositi/lab_dispense/02.htm

Newton's Laws of Motion
A fundamental concept in dynamics is the dynamical system. Since dynamics is the study of motion and forces , things that move or things under the influence of forces or both are called dynamical systems.
Segnalato da: Luisa Demonte Barbera
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http://www.mcanv.com/p1nlm.html

le rocce sedimentarie
sono le dispense di un corso universitario di geologia. il grado di difficoltà però non è particolarmente alto
Segnalato da: stefano quadro
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http://users.unimi.it/paleomag/pdf/introduzione.pdf

caratteristiche dei sedimenti terrigeni
dispense di un corso universitario di geologia
Segnalato da: stefano quadro
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http://users.unimi.it/paleomag/pdf/terrigene.pdf

minerali e rocce
si tratta di una pagina web che raccoglie diversi link interessanti a proposito di rocce e minerali. Livello di scuola secondaria
Segnalato da: stefano quadro
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http://edtech.kennesaw.edu/web/rocks.html

rocks and minerals
una pagina web che raccoglie numerosi link a siti dedicati
Segnalato da: stefano quadro
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http://www.teachers.ash.org.au/jmresources/rocks/links.html

How rocks and minerals are formed
una pagina web che introduce ad un livello molto facile la genesi dei materiali della crosta terrestre
Segnalato da: stefano quadro
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http://www.mineraltown.com/infocoleccionar/How_rocks_minerals_are_formed.htm

roca
pagina web di wikipedia per introdursi nel mondo della rocce; molto generale
Segnalato da: stefano quadro
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http://es.wikipedia.org/wiki/Roca

reconocimiento de rocas
introduzione al riconoscimento dei grandi gruppi di rocce
Segnalato da: stefano quadro
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http://www.escet.urjc.es/~ilopez/Practica%204%20(rocas).pdf

rocas, minerals
una scheda di osservazione macroscopica per la determinazione di una roccia
Segnalato da: stefano quadro
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http://www.educalia.org/paisajes/pdf/roques_minerals_s.pdf

introduccion a las rocas
una introduzione piuttosto approfondita nel mondo delle rocce
Segnalato da: stefano quadro
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http://www.efn.uncor.edu/dep/GeoBas/GeoGral/Apunte%20de%20Rocas.pdf

breve clasificacion de las rocas
pagina introduttiva molto semplice
Segnalato da: stefano quadro
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http://www.educa.aragob.es/geopress/WebgeoNEW/libro/Relieve/Relieve/10-Anexo%20Clasificaci%F3n%20rocas.pdf

l'allevamento di pesce
educazione alimnetare
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http://www.fao.org/docrep/X5738E/X5738E00.htm

Substracts
Most food components are macromolecules. Food macromolecules are biological polymers and are comprised of proteins, nucleic acids, carbohydrates (polysaccharides), and lipids...

Segnalato da: Acerbi, Cedrini, Mencarelli
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http://www.enzymeessentials.com/HTML/substrates.html

Substracts
Types of human nutrient - Substances that provide energy - Substances that support metabolism

Segnalato da: Acerbi, Cedrini, Mencarelli
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http://en.wikipedia.org/wiki/Nutrient#Types_of_human_nutrient

Muscular work
What is work? - Types of physical work - Types of muscle

Segnalato da: Acerbi, Cedrini, Mencarelli
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http://www.ergonomics4schools.com/lzone/work.htm

Muscular cells
Muscle cells contain contractile filaments that move past each other and change the size of the cell. It is classified as skeletal, cardiac, or smooth muscle
Segnalato da: Acerbi, Cedrini, Mencarelli
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http://en.wikipedia.org/wiki/Muscle_cells

Muscular cells
The single-celled protozoan ancestors of animals had their weight supported by water and were able to move by cilia or other simple organelles. The evolution of large and more complex organisms (animals) necessitated the development of support and locomotion systems. Animals use their muscular and skeletal systems for support, locomotion, and maintaining their shape.
Segnalato da: Acerbi, Cedrini, Mencarelli
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http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookMUSSKEL.html

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