Popular Science Website

Scientists have established that the human brain during operation consumes only 10 watts of energy. Meanwhile, he performs a titanic work: for example, when watching a television program, he processes 10⁷ units of information per second. In this figure, only the information that comes through the eyes is taken into account...

Sometimes lightning gets up so that you can think of some special origin of it. Here are some historical facts. July 27, 1691 lightning killed the reapers peacefully eating breakfast under an oak tree. When they tried to touch the dead, they fell to pieces; June 29, 1869 in the city of Ariege, lightning strikes a local mayor, who does not kill, but strips naked and throws all his torn...

In 1916, Albert Einstein expressed that gravitational fields should have their own gravitational waves. The discovery of gravitational waves can have no less fundamental significance than the discovery of radio waves. Perhaps a new kind of connection will appear. Some scientists believe that waves of gravity propagate hundreds of times faster than waves of an electromagnetic field...

In the 18th century. L. Galvani believed that the muscles of animals produce electricity. For example, the foot of a frog, suspended on a copper wire, twitches, touching the iron. Alesandro Volta did not agree with this. For this purpose, in 1799 Volta manufactured the first electric battery, called the Volta pole. Element Volta consisted...

What does it mean to want to drink? This means that the cells of our body do not have enough water. How does a drunk sip of water get into the living cells of our body? Answers to these questions can be obtained by getting acquainted with the phenomenon of osmosis. Nature ordered that if two solutions of different concentrations were separated by a septum that would let the molecules...

The first law of electrostatics says: like charges are repelled, and unlike charges attract. Recall that the charge formed on the glass, worn about silk is called positive, and the charge that appeared on the sealing wax, rubbed against the flannel, is negative. But, we are used to the fact that friction is electrified only by dielectrics. It is believed that conductors can not be electrified at all...