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Auroras are formed by taking a picture of the Earth's magnetic field. Auroras occur when charged particles from the Sun interact with the Earth's magnetic field, causing light emissions in the atmosphere near the poles. These light displays can be seen in the form of colorful curtains or bands of light known as the Northern and Southern Lights.

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What is the method for taking clear images of bones and soft tissues is magnetic resonance?

Magnetic resonance imaging (MRI) uses magnetic fields and radio waves to create detailed images of bones and soft tissues by measuring the signals produced by their respective hydrogen atoms. The technique is non-invasive and provides high-resolution images that help in diagnosing a range of medical conditions. Contrast agents or dyes may be used to enhance the quality of the images in specific cases.


What are the problems of using a magnetic compass at sea?

A magnetic compass can be influenced by surrounding metal. For instance, take a compass bearing when your pocket knife is in your breast pocket, too close to the compass, or there is an underground metal water pipe near by, may cause an error in your compass reading. Even magnetic (iron) rocks you are standing on, can cause a wrong reading. When taking a magnetic bearing, leave your metal framed rucksack to one side.


How can you make an electromagnetic device?

To make an electromagnetic device, you will need a power source such as a battery, a coil of wire to create a magnetic field, and a core material like iron to enhance the magnetic field. By passing an electric current through the coil, you can create a magnetic field, which can then be used for various applications such as electromagnets, generators, or electric motors.


Why are there lines visible when you take a picture of a computer screen?

Lines are visible when taking a picture of a computer screen because of the refresh rate of the screen and the shutter speed of the camera. The refresh rate of the screen and the shutter speed of the camera may not be synchronized, causing the lines to appear in the photo.


What the Combined center of gravity is formed by?

The combined center of gravity is formed by the individual centers of gravity of all the objects that are combined or connected together. It is calculated by taking into account the mass and position of each object to determine the overall center of gravity of the entire system.