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تحلل ألفا
Conditions of Use:
قراءة النص المطبوع بخط رفيع
Rating

شاهد هروب جسيمات ألفا من نواة البولونيوم، مسببة تحلل ألفا المشعة. شاهد كيف أن عدد مرات التسوس العشوائي يرتبط بنصف العمر.

نوع المادة:
محاكاة
Provider:
University of Colorado Boulder
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Danielle Harlow
John Blanco
Kathy Perkins
Noah Podolefsky
Ron LeMaster
Sam McKagan
Wendy Adams
Date Added:
09/02/2012
التفاعلات الذرية (عربي)
Conditions of Use:
قراءة النص المطبوع بخط رفيع
Rating

Explore the interactions between various combinations of two atoms. Turn on the force arrows to see either the total force acting on the atoms or the individual attractive and repulsive forces. Try the "Adjustable Attraction" atom to see how changing the parameters affects the interaction.

نوع المادة:
محاكاة
Provider:
University of Colorado Boulder
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Jack Barbera
John Blanco
Kathy Perkins
Kelly Lancaster
Noah Podolefsky
Wendy Adams
Date Added:
08/01/2009
البالونات و الطفو
Conditions of Use:
قراءة النص المطبوع بخط رفيع
Rating

قم بالتجربة مع بالون هيليوم، منطاد ذو هواء ساخن، أو كرة صلبة مليئة بالغازات المختلفة. اكتشف ما الذي يجعل بعض البالونات تطفو ويجعل البعض الاخر يغرق.

نوع المادة:
محاكاة
Provider:
University of Colorado Boulder
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Danielle Harlow
Kathy Perkins
Ron LeMaster
Date Added:
07/02/2009
البالونات والكهرباء الثابتة
Conditions of Use:
قراءة النص المطبوع بخط رفيع
Rating

لماذا يلتصق البالون بكنزتك؟ قم بفرك البالون بكنزتك, ثم دع البالون و ستجده يطير و يلتصق بالكنزة. شاهد الشحنات على الكنزة, على البالون, و على الجدار.

نوع المادة:
محاكاة
Provider:
University of Colorado Boulder
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Sam Reid
Wendy Adams
Date Added:
07/02/2008
هيكل المجموعة
Conditions of Use:
قراءة النص المطبوع بخط رفيع
Rating

قم باستكشاف أصل مجموعات الطاقة الموجودة في بلورات من الذرات. يحدد هيكل هذه المجموعات كيفية توليد المواد للكهرباء.

نوع المادة:
محاكاة
Provider:
University of Colorado Boulder
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Chris Malley
Kathy Perkins
Sam McKagan
Date Added:
07/02/2010
"Baseketball"
Conditions of Use:
يمكن إعادة ترتيب المحتوى ومشاركته
Rating

This trick from Exploratorium physicist Paul Doherty lets you add together the bounces of two balls and send one ball flying. When we tried this trick on the Exploratorium's exhibit floor, we gathered a crowd of visitors who wanted to know what we were doing. We explained that we were engaged in serious scientific experimentation related to energy transfer. Some of them may have believed us. If you'd like to go into the physical calculations of this phenomenam, see the related resource "Bouncing Balls" - it's the same activity but with the math explained.

نوع المادة:
Activity/Lab
Provider:
متحف Exploratorium لدعم التعليم
المؤلف:
Paul Doherty
The Exploratorium
Date Added:
11/07/2012
Battery-Resistor Circuit
Conditions of Use:
No Strings Attached
Rating

Look inside a resistor to see how it works. Increase the battery voltage to make more electrons flow though the resistor. Increase the resistance to block the flow of electrons. Watch the current and resistor temperature change.

Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Sam Reid
Date Added:
11/20/2008
جهد بطارية
Conditions of Use:
قراءة النص المطبوع بخط رفيع
Rating

انظر داخل البطارية لترى كيف تعمل. قم بتحديد جهد البطارية وتحرك الأرقام الصغيرة اللاصقة الشحنات من أحد طرفي البطارية للاخر. يخبرك الفولتميتر عن جهد البطارية الناتجة عن ذلك.

نوع المادة:
محاكاة
Provider:
University of Colorado Boulder
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Sam Reid
Date Added:
07/02/2008
Catalytic Converter
Conditions of Use:
Remix and Share
Rating

This video lesson aims to motivate students about chemistry and to raise their awareness about how chemistry helps in solving certain environmental problems. In this lesson, the air pollution problem created by cars and other vehicles is presented. The lesson will highlight causes of this problem, harmful products from it and possible solutions. There will also be discussion of ways to convert the pollutants produced by burning oil in vehicles into more friendly products.

Material Type:
Lecture
Provider:
MIT
Provider Set:
MIT Blossoms
Author:
Prof. Mohammad El-Khateeb
Date Added:
06/11/2012
Density (AR)
Conditions of Use:
Read the Fine Print
Rating

Why do objects like wood float in water? Does it depend on size? Create a custom object to explore the effects of mass and volume on density. Can you discover the relationship? Use the scale to measure the mass of an object, then hold the object under water to measure its volume. Can you identify all the mystery objects?

Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Carl Wieman
Chris Malley
Jonathan Olson
Kathy Perkins
Kelly Lancaster
Noah Podolefsky
Patricia Loblein
Sam Reid
Wendy Adams
Date Added:
09/01/2010
آبار مزدوجة و رابطة تساهمية
Conditions of Use:
بلا تقييدات
Rating

استكشف نفق مقسم داخل بئر مزدوج ذو طاقة عالية. توضح هذه المشكلة الكلاسيكية كثير من النظم الفيزيائية، بما في ذلك الرابطة التساهمية، تقاطعات جوزيفسون، وحالتي أنظمة مثل دوران 1/2 الجسيمات وجزيئات الأمونيا.

نوع المادة:
محاكاة
Provider:
University of Colorado Boulder
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Chris Malley
Kathy Perkins
Sam McKagan
Date Added:
10/04/2006
Electric Field of Dreams
Conditions of Use:
No Strings Attached
Rating

Play ball! Add charges to the Field of Dreams and see how they react to the electric field. Turn on a background electric field and adjust the direction and magnitude. (Kevin Costner not included).

Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Sam Reid
Date Added:
11/16/2007
Experimenting with Symmetry
Conditions of Use:
يمكن إعادة ترتيب المحتوى ومشاركته
Rating

In this activity, learners use pattern blocks and mirrors to explore symmetry. Learners work in pairs and build mirror images of each other's designs. In doing so, learners will examine principles of symmetry and reflection.

نوع المادة:
Activity/Lab
Provider:
متحف Exploratorium لدعم التعليم
المؤلف:
Exploratorium
Gordon and Betty Moore Foundation
National Science Foundation
The Exploratorium
Date Added:
12/07/2010
Faraday's Electromagnetic Lab
Conditions of Use:
No Strings Attached
Rating

Play with a bar magnet and coils to learn about Faraday's law. Move a bar magnet near one or two coils to make a light bulb glow. View the magnetic field lines. A meter shows the direction and magnitude of the current. View the magnetic field lines or use a meter to show the direction and magnitude of the current. You can also play with electromagnets, generators and transformers!

Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Carl Wieman
Chris Malley
Danielle Harlow
Kathy Perkins
Michael Dubson
Date Added:
10/22/2006
Gas Properties
Conditions of Use:
No Strings Attached
Rating

Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, change gravity, and more. Measure the temperature and pressure, and discover how the properties of the gas vary in relation to each other.

Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Jack Barbera
Kathy Perkins
Linda Koch
Michael Dubson
Ron LeMaster
Date Added:
10/05/2006
خصائص الغاز
Conditions of Use:
قراءة النص المطبوع بخط رفيع
Rating

قم بضخ جزيئات الغاز في صندوق وشاهد ما سيحدث عند تغيير الحجم، عند إضافة أو إزالة الحرارة وعند تغيير الجاذبية، وأكثر من ذلك. قم بقياس درجة الحرارة والضغط، واكتشف كيف تختلف خصائص الغاز في علاقتها ببعضها البعض.

نوع المادة:
محاكاة
Provider:
University of Colorado Boulder
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Danielle Harlow
Jack Barbera
Kathy Perkins
Linda Koch
Michael Dubson
Ron LeMaster
Date Added:
07/02/2009
General Chemistry I
Conditions of Use:
Read the Fine Print
Rating

This survey chemistry course is designed to introduce students to the world of chemistry. In this course, we will study chemistry from the ground up, learning the basics of the atom and its behavior. We will apply this knowledge to understand the chemical properties of matter and the changes and reactions that take place in all types of matter. Upon successful completion of this course, students will be able to: Define the general term 'chemistry.' Distinguish between the physical and chemical properties of matter. Distinguish between mixtures and pure substances. Describe the arrangement of the periodic table. Perform mathematical operations involving significant figures. Convert measurements into scientific notation. Explain the law of conservation of mass, the law of definite composition, and the law of multiple proportions. Summarize the essential points of Dalton's atomic theory. Define the term 'atom.' Describe electron configurations. Draw Lewis structures for molecules. Name ionic and covalent compounds using the rules for nomenclature of inorganic compounds. Explain the relationship between enthalpy change and a reaction's tendency to occur. (Chemistry 101; See also: Biology 105. Mechanical Engineering 004)

Material Type:
Assessment
Full Course
Homework/Assignment
Lecture
Lecture Notes
Reading
Syllabus
Textbook
Provider:
The Saylor Foundation
Date Added:
11/16/2011
Generator
Conditions of Use:
No Strings Attached
Rating

Generate electricity with a bar magnet! Discover the physics behind the phenomena by exploring magnets and how you can use them to make a bulb light.

Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Carl Wieman
Chris Malley
Danielle Harlow
Kathy Perkins
Michael Dubson
Date Added:
04/01/2008
I Spy Nano!
Conditions of Use:
يمكن إعادة ترتيب المحتوى ومشاركته
Rating

In this game, learners try to find nano-related objects on a game board. Learners investigate the different ways nano is in the world around us.

نوع المادة:
Activity/Lab
Diagram/Illustration
Game
القراءة
Provider:
Nanoscience Informal Science Education
Science and Math Informal Learning Educators (SMILE)
Provider Set:
NISE Network
SMILE Pathway: Science and Math Activities in One Search
المؤلف:
Nanoscale Informal Science Education Network
National Science Foundation
NISE Network
Date Added:
01/02/2011