As a tree grows, lower branches sometimes die, and their bases may become overgrown and surrounded by newer layers of trunk wood, forming a type of imperfection known as a knot.

The dead branch may not be attached to the trunk wood except at its base, and can drop out after the tree has been sawn into boards. The know is often weak but can be pleasing to the sight and are valuable for that reason.

yes

* Added - A rope is weakened by any knot, with the "worst" knots taking away as much as 60% of the ropes strength. This is why sailors and professionals learn a wide variety of knots, hitches, and bends to use the best one for the job.

He makes rope.

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A three strand Turk's Head needs about 2 1/2 times the length a single strand takes to simply coil around 3 times. That is, if the circumference you are going around is 10 inches, it makes a 30 inch coil and will require 75 inches of line.

No, it is just dangerous.

Horses are not typically tied to a post by their reins - It is not unusual to tie a horse to a hitching ring or rail with a half hitch. This has little resistance and an untrained horse can simply pull away from it.

a figure eight follow through is the most commonly accepted knot for climbing and rescue.

The question cannot be answered, as there are many things it cannot be used for but it may be the first step in making a knot for things it should be used for.

The Lark's Head knot, referred to as such by the Boy Scouts, is more often called by sailors and others as a Bale Hitch or Cow Hitch. The Lark's Head is usually made in the bight (the middle of a line when neither end is available to tie a knot) and consists of 2 Half Hitches made in 2 directions against each other. The Lark's Head can be made in a second with one hand and is an easy way to secure anything where the loops may be slid over a post or rail. The Lark's Head can be used as the first step in making other knots as well, such as a Slip Knot. Because the Lark's Head can be made in a second using just 2 fingers, it is popular when it can be used.

Every person has dips, dents, and "knots" on the skull. These are inconsequential. They have no negative consequences. However, from time to time, a place might be sore, especially when touched. Doctors will simply tell you, "Well, then don't touch there!"

Technically it doesn't matter. The length of a rope has no impact upon its breaking point and its strength. How the rope is anchored and any knots used is most important and usually will be responsible for the breaking point.

The Flemish coil is the attractive way to store a line on a boat when it is not in use. This is a flat coil, laid on the deck, with the end of the line in the center and the unused portion of the line wound around this. Depending upon the type of line, it is more difficult to make an attractive Flemish coil that it might appear. These are often found on the bow of sailboats when at dock because of their attractive appearance, but it is not a proper means of storing a line when a boat is underway.

Depending upon the type of knot, it serves many purposes. There are thousands of different knots, and each has a particular best purpose. This ranges from making clothing, or fasteners on clothing, to ornamental and even functional designs, to the type of knot most people think of - to secure something from movement.