Possibly one of the best-known constellations in the northern sky, Ursa Major—or the Great Bear—contains an asterism of seven ...

The American dipper, a drab-looking bird no larger than a robin, is a splashy rarity: a songbird that swims and even walks underwater. This round-bodied gray bird with short wings and a stubby tail is ...

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Free body diagrams do not need to be drawn to scale but it can sometimes be useful if they are. It is important to label each arrow to show the magnitude of the force it represents. The type of ...