Education: Page 57

This is a timelapse of a salt crystal garden growing on a toilet paper roll. You need salt, water, food coloring, ammonia and a dish with a pourous stiff object.

The Tesla CD Turbine is a little homemade turbine made from CD's, CD spindle, supermagnets, and glue. It runs on faucet water pressure.

Unusual magnetic phenomena observations are found here.

The Tesla CD Turbine (the little turbine made from recycled CD's and magnets) is used as a magnetic test bed for this SinkScience experiment. Here, six 3/16 inch diameter neodymium ball magnets are placed in a plastic bowl above the CD Turbine.

MrfixitRick demonstrates a magnetically-coupled Salad Spinner run by the Tesla CD Turbine on faucet water pressure.

MrfixitRick demonstrates the Shake Flashlight Shaker, as it generates electric power out of faucet water pressure. A Tesla CD Turbine is used to convert the kinetic energy of water into rotation. Then, a connecting rod and magnets charges the built-in battery of the shake flashlight.

MrfixitRick shows how to make hydro-electric power using faucet water pressure, a Tesla CD Turbine, and a Subaru radiator fan motor.

MrfixitRick and his assistant Rowan try four "Will It Spin?" experiments in an attempt to see if different objects spin with the rotating magnetic field of the Tesla CD Turbine.

This is a running demonstration of the water-pressure powered Tesla CD Turbine III and Magnetic Coupler, running smoothly and safely at up to 1000 rpm at the sink. The CD Turbine is made from recycled CD's and neodymium magnets.

See how to align the finderscope with the primary optics in this brief tutorial on your telescope. Watch this Amateur Astronomy for Beginners - Telescope Finderscopes.

Keep your stargazing sights and new experiences logged in a journal. Watch Amateur Astronomy for Beginners - The Astronomical Journal.

Here, you'll see the use of red light to preserve your night vision, in Amateur Astronomy for Beginners - Red Light. Bright lights could make it harder for you to see those stars, so use red light, because the rods in your eyes can take it better.

The best physics lecturer, Walter Lewin, makes another wonderful physics demonstration after having read a lecture on batteries.

Here is an educational video for ART (Advanced Robotic Technology) Plasma customers. The HDP Plasma SX Profile Cutter is designed for heavy duty manufacturing environments where power, precision, speed, quality low cost, productivity, and durability are demanded by business owners. See in these sixteen videos how it works, from the inside out, and another video on what it actually is.

Here, you'll hear all about the materials needed to teach English as a foreign language. This guy knows. Trust me.

This is a four part video where I simply talk about the business-related aspects of teaching English to private students.

This is a basic orientation chat for new English teachers about how to go about organizing your thinking when you get into teaching English. You are in control. Remember that!

Sigma Notation. Tetrahedral Numbers. Pyramidal Numbers. You'll learn all about them and some relations between them. Know you're math, or Greek math.

Here, you'll see how to prove that the Well Ordering Principle is equivalent to the Principle of Mathematical Induction.

The first video explains the Method of Mathematical Induction. It also gives a background of Francesco Maurolico, Pascal and John Wallis. You'll see how to apply the Method of Induction to prove the sum of odd numbers is a square.

See this amazing math trick to help you multiply the number nine. It so easy, you won't believe it! Who needs multiplication tables anyway?

Astronomy editor David J. Eicher shares treasures from his personal meteorite collection and gives advice on starting your own.

Learn how to etch an iron meteorite to reveal its hidden crystalline structure. This guy is specifically etching a Campo Del Cielo meteorite. Why? So you can see how to do it yourself.

Here is a cool show that is all about meteorite identification! These two videos touch on some characteristics of stony (chondrite) meteorites that can help you to positively identify a meteorite.

This video describes Resistor Color Codes and how to read them. It relates Resistor Color Codes to scientific numbers and engineering notation.

This is a recording of a class lecture on Voltage Sources. The first part describes how mechanical friction can generate voltages.

In the first video, it introduces the principles and terminology of mechanical electrical switches. It covers terms such as contacts, normally open, normally closed, poles, and throws.

The first video introduces the basic electrical quantities of charge, current, voltage, and resistance. The concept of quantities and units is explained. The units of Coulombs, Volts, Amperes, and Ohms are described. The three basic formulas of Ohm's Law (E=IR, I=E/R and R=E/I) are also introduced.

This is a guided hands-on laboratory activity to help a student understand the proper and safe use of a multimeter to measure voltage using an electronic labs kit. This video guides the student through the proper techniques for measuring voltage with a multimeter.

This guided hands-on laboratory activity to help a student understand the proper and safe use of a multimeter to measure current using an electronic labs kit. This video guides the student through the proper techniques for measuring current with a multimeter.

This video is about electrical wires. It describes common types, configurations of wire, and wire terminology. It explain the gauge system of rating wire size (diameter), circular mils, current capacity, and others.

This video introduces the concept of an electric circuit and how electrons flow through the wire. It describes the difference between an open and closed circuit, and the importance of continuity.

Ivan and Mick from New Scientist show us how to get the iron out of fortified breakfast cereal. You won't believe how much you can find!

See how to do electrolysis of water with graphite (lead from a pencil). The positive side has oxygen bubble, and the negative side has hydrogen bubble. Just get a 9V dry cell battery.

This is an amazing, scientific, rise effect with just a candle, a cup, and a Coke. Anybody can do it, so why not?

These guys make pennies change color in class. No, it's not real gold, and by the way - no, it's not real gold. Just watch and see how to do real alchemy, like you would in chemistry class.

Dr. Kiki creates fire from a pair of glasses, Moujan transforms an empty wine bottle into a lamp, and Heather reveals an underground band who hails from Tokyo!

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this two-part calculus lesson on integrating with special substitutions; rational functions with sine and cosines: Karl Weistrass method.

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this intermediate-algebra two-part lesson on logarithmic applications, chemistry acids and bases. If you've never taken chemistry, well, you should probably go and take it first.

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra two-part lesson on scientific notation. Find out what scientific notation actually is, and see how to work with it.