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The principle of the air purifier?

In modern rooms and offices, due to air conditioners' use, the materials installed in the room also often contain chemicals that are harmful to...

What is the principle of the theft alarm?

In important places such as money, gold, silver, underground record storage, etc., if a fraudster suddenly sneaks in. the burglar alarm will immediately sound...

Why does tree lightning or ball-like lightning appear?

Late in the summer, fire clouds are often heated by the hot ground afternoon, plus the effect of exothermic condensation that develops into succulent...

What is the principle of the fire detector?

Fire harms human lives and property, damages the ecological environment. Fire prevention is a matter of concern to all humans. If it is possible...

What is an audio CD?

Edison's phonograph underwent constant innovation to become a popular electric phonograph. It is made up of the motor, the turntable, the receiver, and the...

Why study the relationship between crops and climate?

Plants grown in a year go through the following phases: sprouting, leafing, blossoming, fruit, deciduous. Year after year is usually unchanged. It is a...

Why does the climate affect humans?

Humans have grown to this day with a population of over six billion. Because in the Primitive period, people living in different conditions and...

Why is cold air in the North cold in the South?

On winter days, when you turn on the radio, you often hear weather forecasts from meteorological radio: A piece of cold air from the...

Why does the climate affect health?

Ancient Chinese medicine scientists said that: Humans live in a natural environment. The change of climate will affect the normal circulation of blood in the body,...

Why does radar can measure storms, thunderstorms, and hurricanes?

Want to know the situation of thunderstorms, storms, and whirlwinds in remote areas? We can use radar to probe. Radar can emit radio waves. These...

Why can we know the weather based on the Moon?

To know why the Moon can predict the weather, first, explain what the moon general is clearly. Moon facies means the circular or missing variation...

Why is the temperature on the ground different?

The sun is hot in summer, unbearable, but the temperature below ground is very cool and comfortable. Take, for example, the average July temperature...
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What is color television?

The human eye sees an object and can see its colors because the light it emits, or light from its surface, bounces off, enters...

What is an audio CD?

Edison's phonograph underwent constant innovation to become a popular electric phonograph. It is made up of the motor, the turntable, the receiver, and the...

What is the principle of the fire detector?

Fire harms human lives and property, damages the ecological environment. Fire prevention is a matter of concern to all humans. If it is possible...

What is the principle of the theft alarm?

In important places such as money, gold, silver, underground record storage, etc., if a fraudster suddenly sneaks in. the burglar alarm will immediately sound...