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Hipervinculo Física

Aiming True

Design the perfect arrow. The goals of this project are: To study the history and aerodynamics of arrows. To calculate an optimal arrow design. To invent a new or improved arrow design.It is an educat ...

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Hipervinculo Biología

High Frequency Hearing Test

There’s a sound that is supposed to annoy teenagers and keep them from loitering in front of shops and stores. It’s called the Mosquito, and it’s supposed to be undetectable by adults. Take some volun ...