100n
Assuming that all strands are vertical/ parallel to gravity and equally spaced (on a radius) around the centre of gravity then tension on each strand will be equivalent to weight x 9.81 divided by 7 equals tension in Newtons. If the strands are not normal and/or at varying distances from centre of gravity then it becomes a little more complicated. Summ of tension on strands must equal weight of bag. Tension on each strand is a ratio of it's distance from the COG of the furthest most strand. Don't forget the further from perpendicular a strand is the more tension on the strand.
6 strands
The common suggestion is to substitute two strands of sport weight for 1 strand of worsted weight. However, everyone's tension is different. If your pattern has a gauge, I would suggest you crochet a small swatch and see if the gauge matches, using your tension. If it is too large, there are other variations you can try. 1 strand of fingering or sock yarn with 1 strand of sport or DK yarn, for example. Of course, that would necessitate having or buying more yarn.
Any force given will be equally divided to each strand. Hence greater is possible. One arm is pulling you out of the water. Then a second arm is offered. Do the two arms pull better than the one arm? Generalize to the rope.
1/10 of a gram
Weight of the chain and tension in the string
weight of crate would be 226 lb...saw it in back of the book
750 MCM (61 strands) 2.316#/ft 750 MCM (7448 strands) 2.719#/ft
As a linear function
Usually yes. The best way to test it is to take a ruler and wrap the two strands together around the ruler continuously for one inch length (make sure the yard does not overlap, nor leave gaps). Then take a strand of chunky yarn and do the same. You should get the same number of rotations around the ruler for each. You may also want to note that using two yarns together of different colors will give you a nice heathered effect in the finished product.
the pressure and heavy weight on it
If the object hangs from a weightless string or thread, the tension in the thread is equal to the weight of the object. If there is weight distributed all the way from the ceiling to the bottom of whatever is hanging, then the tension at every point is equal to the weight of everything below that point.