Engineering, like life, could really use a lot more cheese. This week we are looking at a cheese factory in Toronto and what it can teach us about process control systems. We’ll explore feedforward and feedback systems, and see how integrating them both with the final check of cascade control creates a system made to handle uncertainty the world throws its way.
This collection of videos, animations and documents comes from the NCSSM AP chemistry online course. Chapter two provides practice and demonstrations of the distinction between physical and chemical properties.
Une série de simulations provenant de l’Université de Colorado à Boulder pour les 9e – 12e au sujet des sciences. Cette simulation démontre le processus de circuit batterie-résistance.
Regardez à l'intérieur d'une résistance pour comprendre son fonctionnement. Augmentez la tension de la batterie pour faire passer davantage d'électrons à travers la résistance. Augmentez la résistance pour bloquer le flux d'électrons. Observez le changement de courant et la température de la résistance.
Students are introduced to several key concepts of electronic circuits. They learn about some of the physics behind circuits, the key components in a circuit and their pervasiveness in our homes and everyday lives. Students learn about Ohm's Law and how it is used to analyze circuits.
Students use the same method as in the activity from lesson 2 of this unit to explore the magnetism due to electric current instead of a permanent magnet. Students use a compass and circuit to trace the magnetic field lines induced by the electric current moving through the wire. Students develop an understanding of the effect of the electrical current on the compass needle through the induced magnetic field and understand the complexity of a three dimensional field system.
We’re beginning our engineering journey with a tour through the major branches. Today Shini explains the facets of civil engineering, including structural and construction engineering, city planning, transportation, and sanitation.
In this activity, students construct classic slide rules and use them like calculators. Students use the slide rules to read scales, determine significant figures, and estimate decimal places.åÊ This is activity D3 in the "Far Out Math" educator's guide. Lessons in the guide include activities in which students measure, compare quantities as orders of magnitude, become familiar with scientific notation, and develop an understanding of exponents and logarithms using examples from NASA's GLAST mission. These are skills needed to understand the very large and very small quantities characteristic of astronomical observations. Note: In 2008, GLAST was renamed Fermi, for the physicist Enrico Fermi.
Students learn about gear ratios and power by operating toy mechanical cranes of differing gear ratios. They attempt to pick up objects with various masses to witness how much power must be applied to the system to oppose the force of gravity. They learn about the concept of gear ratio and practice calculating gear ratios on worksheets, discovering that smaller gear ratios are best for picking objects up quickly, and larger gear ratios make it easier to lift heavy objects.
Hydropower generation is introduced to students as a common purpose and benefit of constructing dams. Through an introduction to kinetic and potential energy, students come to understand how a dam creates electricity. They also learn the difference between renewable and non-renewable energy.
Students are challenged to design a method for separating steel from aluminum based on magnetic properties as is frequently done in recycling operations. To complicate the challenge, the magnet used to separate the steel must be able to be switched off to allow for the recollection of the steel. Students must ultimately design, test, and present an effective electromagnet.
Some bird species appear to respond to extreme weather changes in their native habitat by moving to more hospitable environments. This article discusses the role of NASA satellites, along with field and citizen scientists, in studying that movement. The article also includes an activity on constructing a bird feeder. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
The brief introduction to El Ni̱o presented in this article also offers insights into its role during the quiet 2009 hurricane season. This article is part of the Climate Kids website, a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
This series of 11 captioned images depict the harnessing of three types of alternative energy sources: tidal, wind and solar. In contrast, several images of fossil fuel usage are included. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
This question is addressed through a series of questions and answers, each providing related introductory information such as how climate change is studied, the history of Earth‰Ûªs climate, and the effects of climate change on Earth‰Ûªs geology and biology. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
Following a brief introduction to tidal energy, this article discusses the use of tidal generators to convert that energy into electricity. The article also features a description and images of the Invergordon, Scotland tidal energy generator. This lesson is part of the Climate Kids website, a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
The movement of Arctic air, known as the Arctic oscillation, can and will cause periodic extreme winter weather outside the Arctic region - the harsh winter experienced in many parts of the U.S. in 2010 is a recent example. This article explains the connection between the two events. This article is part of the Climate Kids website, a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
Instructions are provided for making a solar oven, followed by directions for using the oven to make s'mores. A side column discusses the practicality of using solar ovens in places like western Africa. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
The site features an online game in which participants keep recyclable items out of the trash by guiding them into proper bins. Accompanying the game is a list of three categories of items that can be recycled, along with the benefits of doing so. This lesson is part of the Climate Kids website, a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
This article examines the ocean's role in heat absorption and carbon dioxide absorption. The consequences of changes in those, as well as in ocean water salinity, are discussed. The article is part of the Climate Kids website, a NASA education resource featuring articles, videos, images and games focused on the science of climate change.
Students determine the ability of various lenses and mirrors to gather light in order to compare and calculate their light gathering power.åÊThis activity is part of Unit 3 in the Space Based Astronomy guide that contains background information, worksheets, assessments, extensions, and standards.