simple science


Simple Science


Magnets and Currents:
In the twelfth century, there was introduced into Europe from China a simple instrument which changed journeying on the sea from uncertain wandering to a definite, safe voyage. This instrument was the compass, and because of the property of the compass needle (a magnet) to point unerringly north and south, sailors were able to determine directions on the sea and to steer for the desired point.

Since an electric current is practically equivalent to a magnet, it becomes necessary to know the most important facts relative to magnets, facts simple in themselves but of far-reaching value and consequences in electricity. Without a knowledge of the magnetic characteristics of currents, the construction of the motor would have been impossible, and trolley cars, electric fans, motor boats, and other equally well-known electrical contrivances would be unknown.

FIG. - The compass.

Baking Powders
How and Why Colors Change
Farsightedness and Nearsightedness
Advances in Telegraphy
Voltage and Voltmeters
The Candle
The Value of Overtones
Amount of Expansion and Contraction
The Different Foods
The Telephone
Wind Instruments
More ...

Test your English Language
Rules For Play Xmas Games
Rules to play 15 Ball Pool
Rules to play 3 Ball Pool
Rules to play 8 Ball Pool
Rules to play 9 ball Pool
Rules to play Aquatics
Rules to play Arm Wrestling
Rules to play Bank pool
Rules to play Baseball
Rules to play Beach Volleyball
Marriage Tips
Tummy Toning Exercises
Rules to play Roller Soccer
Most Destructive Small Creatures in the world
Best Mobile phones in the World
Popular Men Deodorant Brands
Tips to succeed in Study
Rules to play Jai Alai
Kitchen Design Ideas
Stress Management Tips