GPS’s calculate speed using distance travelled over time. Your phones consumer based built-in GPS typically has a stated accuracy of 1-3 metres, I would not trust your phone for a reading finer than ...
The average car speedometer may be off by a few mph There are several GPS and 3rd party apps that show your actual speed The speedometer, of course, tells you how fast or slow your car is moving when ...
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Is your car's speedometer accurate?
The speedometer, of course, tells you how fast or slow your car is moving when you’re behind the wheel. The traditional speedometer shows a hand that raises or lowers, or swings left and right, when ...
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