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Besides the great design
Ruby on rails t shirt
The hoodie is 50% cotton and 50% polyester
It's the perfect gift for geeky people
Doppler effect coffee mug Programming Besides the great designCoffee mug design visualizing the Doppler effect Doppler effect or doppler shift is when a source of wave is moving away or towards an observer. As a result the wave frequency is increased or decreased and the amount of change depends on the speed of the moving object. This is the reason that the siren of an emergency vehicle passing us sounds higher as it approaches us and after it passes us it's higher. Another very common instance of it is the so
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