In this lesson, students learn about work as defined by physical science and see that work is made easier through the use of simple machines. Already encountering simple machines everyday, students will be alerted to their widespread uses in everyday life. This lesson serves as the starting point for the Simple Machines Unit.
Fluid bed dryer plays an integral role in the pharmaceutical industry. This is due to the many advantages that it offers over the conventional drying techniques.
This article explores all the advantages and disadvantages of the fluid bed dryer. With this information, you can comfortably choose the right pharmaceutical fluid bed dryer.
Playfully alluding to Lewis Carroll's tale of Alice Through the Looking Glass, this case study considers the problems that would arise if a person were to cross over into a mirror-image environment. Students read about a drowsy undergraduate studying for a stereochemistry exam who finds herself in a place where spearmint gum tastes like caraway seed. The case emphasizes the lock-and-key theory of enzyme action and stresses the need for molecules to have the proper chirality if they are to be biologically useful. Designed for introductory organic chemistry and biochemistry courses, the case could also be used in biology courses.
Boundary layers as rational approximations to the solutions of exact equations of fluid motion. Physical parameters influencing laminar and turbulent aerodynamic flows and transition. Effects of compressibility, heat conduction, and frame rotation. Influence of boundary layers on outer potential flow and associated stall and drag mechanisms. Numerical solution techniques and exercises. The major focus of 16.13 is on boundary layers, and boundary layer theory subject to various flow assumptions, such as compressibility, turbulence, dimensionality, and heat transfer. Parameters influencing aerodynamic flows and transition and influence of boundary layers on outer potential flow are presented, along with associated stall and drag mechanisms. Numerical solution techniques and exercises are included.
Students experiment with a new materialâaerogel. Aerogel is a synthetic (human-made) porous ultra-light (low-density) material, in which the liquid component of a gel is replaced with a gas. In this activity, student pairs use aerogel to simulate the environmental engineering application of cleaning up oil spills. In a simple and fun way, this activity incorporates density calculations, the material effects of surface area, and hydrophobic and hydrophilic properties.
In this activity about light and perception, learners discover how a flash of light can create a lingering image called an "afterimage" on the retina of the eye. Learners will be surprised when they continue to see an image of a bright object after staring at it and looking away. Use this activity to introduce learners to principles of optics and perception as well as to explain why the full moon often appears larger when it is on the horizon than when it is overhead. This lesson guide also includes a few extensions like how to take "afterimage photographs."
This is a series of activities demonstrating that air has mass, takes up space, and can exert a force on objects enough to lift them.
By watching and performing several simple experiments, students develop an understanding of the properties of air: it has mass, it takes up space, it can move, it exerts pressure, it can do work.
This is a series of investigations about air and its properties. How air exists all around us, and things it is capable of doing.
You will learn about "Air Pollution" in this video. Cutting of trees is one of the major reasons of air pollution. Air also gets polluted due to the smoke released by many factories and industries. Burning of wood and fossil fuels is another reason of air pollution. Also, vehicles such as cars, buses, trucks etc. give out a lot of smoke that pollutes the air. Due to air pollution, human beings suffer from a number of diseases like asthma, bronchitis, cancer, skin diseases etc.
Air pollution also affects the growth of plants and causes damage to our beautiful historical monuments. As responsible citizens, it is necessary to take up some preventive measures to reduce air pollution and its effects. We must plant more trees, avoid bursting firecrackers, make more use of public transport and ensure that regular servicing of our vehicles is done. Lastly, factories and power plants should also be set up far from residential areas, which will help in reducing air pollution
Students are introduced to measuring and identifying sources of air pollution, as well as how environmental engineers try to control and limit the amount of air pollution. In Part 1, students are introduced to nitrogen dioxide as an air pollutant and how it is quantified. Major sources are identified, using EPA bar graphs. Students identify major cities and determine their latitudes and longitudes. They estimate NO2 values from color maps showing monthly NO2 averages from two sources: a NASA satellite and the WSU forecast model AIRPACT. In Part 2, students continue to estimate NO2 values from color maps and use Excel to calculate differences and ratios to determine the model's performance. They gain experience working with very large numbers written in scientific notation, as well as spreadsheet application capabilities.
Air pressure is pushing on us all the time although we do not usually notice it. In this activity, students learn about the units of pressure and get a sense of just how much air pressure is pushing on them.
This is an inquiry activity that relies of pervious understanding of balancing and weighing to introduce a properties of air.
Students are introduced to air masses, with an emphasis on the differences between and characteristics of high- versus low-pressure air systems. Students also hear about weather forecasting instrumentation and how engineers work to improve these instruments for atmospheric measurements on Earth and in space.
A short video about the history of air pollution from the 17th century to the late 20th century. It covers John Evelyn's writings about air quality in London, the Industrial Revolution and the Great London Smog of 1952 and its aftermath. It concludes by suggesting that the traditional smogs have been replaced by photochemical smogs caused by cars.
Rules for naming alkenes (molecules containing a carbon-carbon double bond). Created by Jay.
Introduction to alkenes: geometry and rotation about the double bond and stability of differently substituted forms. Created by Jay.
Students learn about the differences between types of water (surface and ground), as well as the differences between streams, rivers and lakes. Then, they learn about dissolved organic matter (DOM), and the role it plays in identifying drinking water sources. Finally, students are introduced to conventional drinking water treatment processes.
يتحدث هذا الرابط عن اضمحلال الأنوية بأنبعاث ألفا حيث يكون عند الأنويه الثقيلة زيادة في عدد النيوترونات وبالتالي تسعى هذه الأنويه للأستقرار للتخلص من طاقتها بأنبعاث جسيمات . الفا هو عبارة عن نواة ذرة الهليوم .
