World science

Simple science and experiments

Indonesian Culture – indonesiaculture.net. Night since last arrived, the night market should have been crowded with visitors, passing of this wide land. Tumult of visitors tends to slightly reduce the loud roar of the engine generator – power has been since the afternoon pushing nonstop merry-go-round, although no one riding. Unsaturated spins, to continue to attract people to come and ride around.
“Lestaria” carrousel, are certainly “The Ordinary Night Market”. It will remain everlasting into ordinary night market – Entertain marginalized peoples, peoples who could not reach the pass ticket Ala “Disneyland” style or video games. Not able shop at the Mall, even the corners posters flirting with the large write “Jakarta Great sale.”
People’s night market has become one part of the history of our nation journey. In 1920, thousands of youth gathered on Monas region. Gambir Night Market became a medium of the fusion of different layers of the society from all corners of Jakarta (Batavia). Not only become a place of goods transactions, but rather a space for the exchange of information, even when the freedom fighters prepare for against the invaders.
For Ujang, lucky Mas Jangkung had to understand the conditions of the night market which increasingly empty. For him the most important operational needs 10 liters of diesel fuel to operate 3 diesel engines and some money left for his servants. Workers are paid based on the entering of visitors every night. 25% revenue share for his 10 workers, remaining for other operating expenses, such as legal fees, diesel fuel and rental trucks.
Indonesian Culture – indonesiaculture.net. Night since last arrived, the night market should have been crowded with visitors, passing of this wide land. Tumult of visitors tends to slightly reduce the loud roar of the engine generator – power has been since the afternoon pushing nonstop merry-go-round, although no one riding. Unsaturated spins, to continue to attract people to come and ride around.

Monday, February 28, 2011

Scenting coins

Posted by worldscience at 2/28/2011 10:59:00 PM

Three different coins lie in a plastic dish. You close your eyes while another person takes out one coin, holds it for several seconds in his closed hand, and puts it back.

Now hold the coins one after the other briefly to your upper lip and find out immediately, to everyone’s astonishment, which coin was taken from thedish.Since metal sare very good conductor sof heat,the coin warm sup immediately in the hand.

But plastic is a poor conductor, so hardly any heat is lost to the dish when the coin is put back. The upper lip is particularly sensitive and reveals the smallest temperature difference in the coins, so that you can detect the right one immediately. Before the trick is repeated it is a good idea to lay the coins on a cold stone floor to conduct away the heat.

Tuesday, February 22, 2011

Fire Guard

Posted by worldscience at 2/22/2011 03:10:00 AM

Hold a metal kitchen sieve in a candle flame. To your surprise the flame only reaches the wire net, but does not go through it.

The metal in the sieve conducts so much heat away that the candle wax vapour cannot ignite above the wire net. The flame only passes through the metal lattice if it is made to glow by strong heating.

Theminer’s safety lamp works in the same way.A metall attice surrounding the naked flame takes up so much heat that the gases in the mine cannot ignite.