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Why is it often foggy in early autumn and winter?

Air containing steam has a certain limit, reaching the maximum limit called saturated steam. The higher the air temperature, the greater the capacity to...

Why does the tropical sea produce whirlwinds?

Every year, during the cyclone season (low pressure or cyclone), if you pay attention to the news, Radio you will discover: cyclones often produce...

Why does the autumn wind more whirlwind than spring?

There are cyclones (low pressure) in the northwest Pacific Ocean in a year and four seasons, but most of them focus on summer and...

Why do electrical appliances have to be grounded?

Many home electrical appliances use 220 volts; to ensure safety, they must connect their outer metal shells to the ground wire to be very...

The principle of vacuum cleaner operation

Use a vacuum cleaner to remove dust from carpets and furniture, both quickly and conveniently. Why can a vacuum cleaner vacuum? Want to understand this...

Why can’t the transformer adjust the battery voltage?

The voltage on both ends of a dry battery pack is 1.5 volts. If you want a higher voltage, you have to stack each...

Why does electronic scale show weight and price?

Among scales, there is a new type of scale emerging that is the electronic scale. When weighing goods, it is not only inaccurate but...

Why can the game machine’s Light gun hit the target on the screen?

Why can the game machine's Light gun hit the target on the screen? When playing a shooting game, using a photoelectric gun to aim correctly...

Why can we see the scene clearly in the dark with night vision?

Why can we see the scene clearly in the dark with a night vision device? Wanting to see the scene in the dark, just relying...

Why are some fans blowing out simulated natural winds?

Why are some fans blowing out simulated natural wind? Before the invention of air-conditioning, fans were indispensable electrical appliances to prevent heat and cool down...

Why can the rice cooker automatically cook rice and keep the heat?

Why can the rice cooker automatically cook rice and keep the heat? Use the rice cooker for cooking rice; just put the rice that has...

Why do electromagnetic ovens have to use flat bottom pots

Why do electromagnetic ovens have to use flat bottom pots? In daily life, most food cooking is done using an iron pan with a curved...
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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...