Science Experiment - Fruit-Power Battery - All Languages
Voltaic batteries of all shapes and sizes are objects that convert chemical energy into electrical energy. You probably use batteries to power your...
Voltaic batteries of all shapes and sizes are objects that convert chemical energy into electrical energy. You probably use batteries to power your cell phone, iPod, or any number of wireless gadgets. But did you know that you can actually use chemical energy stored within a lemon to power a small LED light? It\'s true, and we\'ll show you exactly how in the Fruit-Power Battery experiment. How does it work? Batteries are comprised of two different metals suspended in an acidic solution. With the Fruit-Power Battery, the two metals are zinc and copper. The zinc is in the galvanization of the nail, and the penny is actually copper-plated zinc. The acid comes from the citric acid inside the lemon. The two metal components are electrodes, the parts of a battery where electrical current enters and leaves the battery. With a zinc and copper set-up, the current will flow out of the penny and into the nail. The electricity also passes through the acidic solution inside the lemon. Once the Fruit-Power Battery is connected to the LED, you create a complete circuit. As the electrical current passes through the LED, it lights the LED, and passes back through all of the lemons.
1m:8s
8894
Spin Art - Is Black Really Black - All languages
What color is black? Some people answer with a simple \\\"black,\\\" while others respond with something like \\\"black is the...
What color is black? Some people answer with a simple \\\"black,\\\" while others respond with something like \\\"black is the absence of all color.\\\" If you have ever run out of black paint or your black pen ran dry, you probably know how to make the color black. Mix a little blue with red and yellow and green and orange and purple and you finally make the color black. Do the people who make black pens mix different colors to make black? Using a technique called chromatography, let\\\'s find out exactly what makes up the color in that black pen.
1m:1s
5602
Folding Egg - Cool Science Experiment - English
The Folding Egg activity is actually an extension of the classic Rubber Egg experiment with a really fun twist. Just imagine the look on your...
The Folding Egg activity is actually an extension of the classic Rubber Egg experiment with a really fun twist. Just imagine the look on your friends\' faces when you show them an egg and then proceed to fold it in half several times until it forms a small white ball! Wait... it gets better. Just bounce the \"folded egg\" between your hands and the egg reappear.
How does it work?
The acetic acid in the vinegar breaks down the calcium carbonate in the eggshell, and the bubbles that form on the surface of the egg are carbon dioxide gas. Eventually the hard shell of the egg disappears entirely and all that remains is the egg membrane. Because you have already blown out the contents of the egg, the membrane is just full of air. You can fold it up and the air will sneak out the tiny hole in the membrane you used to blow out the egg. The membrane will compress down into practically nothing. As you gently shake the \"folded egg,\" the air will re-enter the membrane, expanding back into its original shape and volume.
3m:14s
7175
Science Experiment - Amazing 9 Layer Density Tower - All Languages
For years we have been making seven layer density columns. We challenged our team to not only add two more liquids, but add seven objects that...
For years we have been making seven layer density columns. We challenged our team to not only add two more liquids, but add seven objects that would float at different levels. The outcome... the Amazing 9 Layer Density Tower!
1m:24s
6219
Science Experiment - Diving Ketchup - All Languages
Cause a packet of ketchup to rise and fall on command in a bottle of water. People will think that you have the ability to move objects with your...
Cause a packet of ketchup to rise and fall on command in a bottle of water. People will think that you have the ability to move objects with your mind! Telekinesis? No, just cool science.
0m:58s
6409
[DOCUMENTARY] علم و ایمان Ilm o Eman - Urdu
A great knowledgeable documentary that highlights the connection between Ilm and Eman. Divine Religion has played a vital role in driving great...
A great knowledgeable documentary that highlights the connection between Ilm and Eman. Divine Religion has played a vital role in driving great scientists to explore in the field of science. This documentary shatters the propaganda that religion (Islam) is against scientific development and progress.
The real divine Abrahamic religion (Judaism, Christianity, Islam) were not and are not against science!
37m:50s
10219