The Physics Classroom
הסרטון של כדור הארץ מהחלל, הפעם ב-HD - מדע וסביבה
בסרטון ששחררה אתמול (שלישי) נאס"א נראים צילומים מרהיבים של כדור הארץ. את הסרטון צילמה תחנת החלל הבינלאומית, שנמצאה בגובה 350 קילומטרים, בתקופה שבין אוגוסט לאוקטובר 2011. הסרטון בן החמש דקות מתחיל בצילומים של ארצות הברית ומסתיים בצילומים ממזרח אירופה ובדרום-מזרח אסיה. בין היתר נראים הזוהר הצפוני והדרומי, המזרח התיכון ומדבר סהרה, מרכז אמריקה ועוד. כמו כן ניתן להבחין במופעי ברקים. סדר הקטעים בסרטון: 1. עמוד הפייסבוק של הארץ - המקום הכי חם במערכת השמש.
NASA Kids Club
Skip to main content NASA Kids Club › Text Only Site Space Racers Watch. Angry Birds Go Look! Buzz Lightyear Returns From Space Play Now Space School Musical Watch Now! For Parents and Teachers Teach your kids and students safe surfing habits. › Tips for Parents › Tips for Teachers Children's Protection Act Learn about what you can do to protect your privacy online. › Tips to protect your online identity Page Last Updated: July 1st, 2014 Page Editor: NASA Education NASA Kids Club
Dictionary
BRAINMETA.COM - NEUROSCIENCE, CONSCIOUSNESS, BRAIN, MIND, MIND-BRAIN, NEUROINFORMATICS, BRAIN MAPS, BRAIN ATLASES
The Energy Story
Energy is one of the most fundamental parts of our universe. We use energy to do work. Energy lights our cities. Energy powers our vehicles, trains, planes and rockets. Energy warms our homes, cooks our food, plays our music, gives us pictures on television. Energy powers machinery in factories and tractors on a farm. Energy from the sun gives us light during the day. Everything we do is connected to energy in one form or another. Energy is defined as: "the ability to do work." When we eat, our bodies transform the energy stored in the food into energy to do work. Cars, planes, light bulbs, boats and machinery also transform energy into work. Work means moving something, lifting something, warming something, lighting something. There are many sources of energy. The forms of energy we will look at include: Electricity We will also look at turbines and generators, at what electricity is, how energy is sent to users, and how we can decrease or conserve the energy we use.
BBC Solar System
Contact - DocumentCloud
Looking for an account? If you’re interested in using DocumentCloud, just ask. Okay, so it isn't quite that simple: DocumentCloud accounts are all newsroom based. If that describes you, definitely request an account. Office Hours We're experimenting with something new: office hours. Jeremy (as jashkenas) and Ted (as knowtheory) should definitely be in the channel most workdays from 9-5 eastern time, and the odds are good we'll keep longer hours than that. Other Questions Most questions about how to use DocumentCloud should be sent to support@documentcloud.org. Looking for technical support DocumentCloud? If you need help implementing our software components (eg.
The Mill of Time by Terry Alden
by Terry Alden Part I: Celestial Cycles and Ancient Mythological Science We are on the verge today of a much greater appreciation for the scientific achievements of the world's most ancient civilizations and an understanding of the workings of the ancient mind. At a time when it is still fashionable for scientists to dismiss the possibility that the learned men of remote antiquity, long before the classical-period Greeks or the later Romans, could have known about phenomena like precession (the extremely slow wobble of the Earth's axis of rotation) without modern instruments, or about the spherical shape and dimensions of our planetary spacecraft or its orbit about the Sun as the center of a solar system, a few lone investigators have recently found traces of a very high degree of scientific sophistication and knowledge of the natural world preserved in a metaphorical code which we call myth. Campbell once asked an interviewer he didn't particularly like to give an example of a myth.
Difference Between Isotopes and Isobars
Isotopes vs Isobars Atoms are the small building blocks of all existing substances. There are variations between different atoms. Also, there are variations within the same elements. Isotopes are examples for differences within a single element. Isotopes Atoms of the same element can be different. 1H – no neutrons, relative abundance is 99.985% 2H- one neutron, relative abundance is 0.015% 3H- two neutrons, relative abundance is 0% The number of neutrons a nucleus can hold differs from element to element. A mass spectrometer can be used to get information about isotopes. Isobars Isobars are atoms of different elements with the same mass number but their atomic numbers are different. Related posts:
