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"Compass functionality in phones and tablets is enabled by a sensor called a magnetometer, which is used to measure the strength and direction of magnetic fields. By analyzing Earth's magnetic field, the sensor allows a phone to determine its orientation pretty accurately."
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How does a periscope work?
In the periscope, light hits the top mirror at 45° and reflects away at the same angle which then bounces down to the bottom mirror. When that reflected light hits the second mirror, it is reflected again at 45°, right into your eye and you can see what's going on above. It is used in submarines and even military tanks.
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Get your priorities straight and decide on how to place your study topics in these four boxes. It will help you to focus and better time management
1. For activities that are urgent and important.
2. For activities that are important but not urgent.
3. For activities that are urgent but not important.
4. For activities that are neither important nor urgent.
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