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Watch alpha particles escape from a polonium nucleus, causing radioactive alpha decay. See how random decay times relate to the half life.

الموضوع:
Physical Science
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Danielle Harlow
John Blanco
Kathy Perkins
Noah Podolefsky
Ron LeMaster
Sam McKagan
09/02/2012
Conditional Remix & Share Permitted
CC BY-NC-SA
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The purpose of this learning video is to show students how to think more freely about math and science problems. Sometimes getting an approximate answer in a much shorter period of time is well worth the time saved. This video explores techniques for making quick, back-of-the-envelope approximations that are not only surprisingly accurate, but are also illuminating for building intuition in understanding science. This video touches upon 10th-grade level Algebra I and first-year high school physics, but the concepts covered (velocity, distance, mass, etc) are basic enough that science-oriented younger students would understand. If desired, teachers may bring in pendula of various lengths, weights to hang, and a stopwatch to measure period. Examples of in- class exercises for between the video segments include: asking students to estimate 29 x 31 without a calculator or paper and pencil; and asking students how close they can get to a black hole without getting sucked in.

Subject:
Engineering
Algebra
Material Type:
Lecture
Provider:
MIT
Provider Set:
MIT Blossoms
Author:
Stephen M. Hou
06/02/2015
Unrestricted Use
CC BY
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Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink.

الموضوع:
الفيزياء
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Danielle Harlow
Kathy Perkins
Ron LeMaster
07/02/2009
Unrestricted Use
CC BY
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Why does a balloon stick to your sweater? Rub a balloon on a sweater, then let go of the balloon and it flies over and sticks to the sweater. View the charges in the sweater, balloons, and the wall.

Subject:
Physics
Material Type:
Simulation
Provider:
Provider Set:
PhET Interactive Simulations
Author:
Sam Reid
07/02/2008
Some Rights Reserved
Rating
0.0 stars

Explore the origin of energy bands in crystals of atoms. The structure of these bands determines how materials conduct electricity.

Subject:
Physics
Material Type:
Simulation
Provider:
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Chris Malley
Kathy Perkins
Sam McKagan
07/02/2010
Conditional Remix & Share Permitted
CC BY-NC-SA
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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.

Subject:
Physics
Material Type:
Activity/Lab
Provider:
Exploratorium
Author:
Paul Doherty
The Exploratorium
11/07/2012
Unrestricted Use
CC BY
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0.0 stars

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.

Subject:
Physics
Material Type:
Simulation
Provider:
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Sam Reid
11/20/2008
Unrestricted Use
CC BY
Rating
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Look inside a battery to see how it works. Select the battery voltage and little stick figures move charges from one end of the battery to the other. A voltmeter tells you the resulting battery voltage.

الموضوع:
الفيزياء
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Sam Reid
07/02/2008
Unrestricted Use
CC BY
Rating
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When will objects float and when will they sink? Learn how buoyancy works with blocks. Arrows show the applied forces, and you can modify the properties of the blocks and the fluid.

الموضوع:
الفيزياء
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Archie Paulson
Carl Wieman
Chris Malley
Jonathan Olson
Kathy Perkins
Kelly Lancaster
Noah Podolefsky
Patricia Loblein
Sam Reid
10/01/2010
Unrestricted Use
CC BY
Rating
0.0 stars

This new version of the CCK adds capacitors, inductors and AC voltage sources to your toolbox! Now you can graph the current and voltage as a function of time.

Subject:
Electronic Technology
Material Type:
Simulation
Provider:
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Kathy Perkins
Michael Dubson
Sam Reid
07/12/2008
Unrestricted Use
CC BY
Rating
0,0 stars

Build circuits with capacitors, inductors, resistors and AC or DC voltage sources, and inspect them using lab instruments such as voltmeters and ammeters.

الموضوع:
Electronic Technology
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Kathy Perkins
Michael Dubson
Sam Reid
07/01/2006
Unrestricted Use
CC BY
Rating
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An electronics kit in your computer! Build circuits with resistors, light bulbs, batteries, and switches. Take measurements with the realistic ammeter and voltmeter. View the circuit as a schematic diagram, or switch to a life-like view.

الموضوع:
Electronic Technology
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Kathy Perkins
Michael Dubson
Sam Reid
06/15/2005
Unrestricted Use
CC BY
Rating
4,0 stars

Build circuits with resistors, light bulbs, batteries, and switches and take measurements with laboratory equipment like the realistic ammeter and voltmeter.

الموضوع:
Electronic Technology
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Kathy Perkins
Michael Dubson
Sam Reid
07/01/2004
Unrestricted Use
CC BY
Rating
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Experiment with conductivity in metals, plastics and photoconductors. See why metals conduct and plastics don't, and why some materials conduct only when you shine a flashlight on them.

الموضوع:
الفيزياء
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Kathy Perkins
Sam McKagan
Sam Reid
07/01/2004
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
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In this optics/mathematics activity, learners use two hinged mirrors to create a kaleidoscope that shows multiple images of an object. Learners discover that the number of images reflected in the mirrors depends on the angle between the mirrors. Learners also observe that when they set the hinged mirrors on top of a third mirror, they create a reflector that always sends light back in the direction from which it came. Use this activity to introduce basic principles of light and optics including angle of reflection and angle of incidence.

الموضوع:
الرياضيات
نوع المادة:
Activity/Lab
Provider:
متحف Exploratorium لدعم التعليم
Provider Set:
Science Snacks
12/07/2012
Only Sharing Permitted
CC BY-NC-ND
Rating
5,0 stars

This lesson unit is intended to help you assess whether students recognize relationships of direct proportion and how well they solve problems that involve proportional reasoning. In particular, it is intended to help you identify those students who: use inappropriate additive strategies in scaling problems, which have a multiplicative structure; rely on piecemeal and inefficient strategies such as doubling, halving, and decomposition, and have not developed a single multiplier strategy for solving proportionality problems; and see multiplication as making numbers bigger, and division as making numbers smaller.

الموضوع:
الأعداد والعمليات الحسابية
نوع المادة:
التقييم
Lesson Plan
Provider:
Shell Center for Mathematical Education
Provider Set:
Mathematics Assessment Project (MAP)
04/26/2013
Unrestricted Use
CC BY
Rating
0,0 stars

Explore tunneling splitting in double well potentials. This classic problem describes many physical systems, including covalent bonds, Josephson junctions, and two-state systems such as spin 1/2 particles and ammonia molecules.

الموضوع:
الفيزياء
نوع المادة:
محاكاة
Provider:
Provider Set:
المحاكاة التفاعلية لموقع PhET
المؤلف:
Carl Wieman
Chris Malley
Kathy Perkins
Sam McKagan
10/04/2006
Unrestricted Use
CC BY
Rating
0,0 stars

Play hockey with electric charges. Place charges on the ice, then hit start to try to get the puck in the goal. View the electric field. Trace the puck's motion. Make the game harder by placing walls in front of the goal. This is a clone of the popular simulation of the same name marketed by Physics Academic Software and written by Prof. Ruth Chabay of the Dept of Physics at North Carolina State University.

الموضوع:
الفيزياء
نوع المادة:
محاكاة
Provider: