remember to not skip out on slightly wetting the knot with saliva, as it reduces friction thereby diminishing the chances for micro abrasions to form within the knot. Whereas these tiny abrasions can ...

Friction is a force that opposes motion. It is present whenever two surfaces rub over each other, such as when you rub your hands together, or when you apply the brakes on a bike or in a car.

In this critical speed condition the bow wave and the stern wave add in phase and the wave-making resistance increases rapidly. The 7 knot cruising speed of the trireme is dominated by energy loss to ...