Facts Junkies™̶ Family

2022-02-22 10:01:40 Why do cars have antenna?”

Antennae are used to convert electrical power into radio waves (for broadcast) or radio waves into electrical power (reception). They're used in conjunction with a transmitter or receiver.

In most cars, it's for receiving radio broadcasts for the purpose of entertainment/music.

Some vehicles, such as commercial or government vehicles, use them to transmit as well as receive radio signals for the purpose of communicating with each other or with a central dispatch.

Sometimes, you may see vehicles without an obvious antenna that are still able to receive radio broadcasts. In such instances, they can be hidden as an integrated component somewhere on the vehicle. For example, Honda integrates their radio antenna on the rear windshield on many models.
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2022-02-20 10:00:58 Why Do Leaves Change Color?

Leaves are green in the spring and summer because that’s when they are making lots of chlorophyll. Chlorophyll is important because it helps plants make energy from sunlight—a process called photosynthesis.

The summer sunlight triggers the leaves to keep making more chlorophyll. But trees are very sensitive to changes in their environment.

As summer fades into fall, the days start getting shorter and there is less sunlight. This is a signal for the leaf to prepare for winter and to stop making chlorophyll. Once this happens, the green color starts to fade and the reds, oranges, and yellows become visible.
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2022-02-18 10:00:40 Why Don't Satellites Fall out of the Sky?

Satellites don’t fall from the sky because they are orbiting Earth. Even when satellites are thousands of miles away, Earth’s gravity still tugs on them. Gravity—combined with the satellite’s momentum from its launch into space—cause the satellite to go into orbit above Earth, instead of falling back down to the ground.
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2022-02-16 10:01:49 ​​What does CE marking on Electronic Device represent?

CE stands for Conformité Européenne. It's French for European Conformity.
CE marking is a certification mark that indicates conformity with health, safety, and environmental protection standards for products sold within the European Economic Area (EEA). The CE marking is also found on products sold outside the EEA that are manufactured in, or designed to be sold in, the EEA. This makes the CE marking recognizable worldwide even to people who are not familiar with the European Economic Area. It is in that sense similar to the FCC Declaration of Conformity used on certain electronic
devices sold in the United States.
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