Answer:
One sheave means that you are using a single drum winder. They are the worst! Double drum winders control easier, brake better and are much more efficient. They save time ( two skips or cages) and can be clutched to perform faster shift transport. A single drum is slow, unbalanced and can be a nightmare if it trips out during hoisting. If the brake system is not perfect it can be a real hairy experience. For a runaway single drum, there is no counterbalance effect. It always runs to destruction. With a double drum, the driver still has a chance to control the winder to a certain extent and he has two sets of brakes to rely on. A single sheave could also mean a shaft with a single compartment. No second means of escape unless there are ladders or stairways. Not a very healthy situation.
Those are just a few points. I am sure much more can be said in favor of a double drum winder and two or more sheaves in the headgear. Most of the shafts I have worked at have multiple winders and up to ten compartments. They all have a small single drum service winder for emergencies and moves of personnel during shift times. They are referred to as the Mary - Annes. Apparently, the name originated in the U.K. where an aristocratic mine owner named the first such winder after his mistress.
Explanation:
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Wrong, You should get renters insurance to insure your items that you do have or will recieve in the future are safe
A) when the soil is stripped by wind or water.. when this happens the soil can be rid of it's nutrients and fertility.. The other options are actually kind of helpful, when the bedrock is damaged by animals (unless you've already set up and everything) it actually helps to till the soil, the water will help to moisten it and make it better or providing life (depending upon the amount of water tht is) and burrowing animals can consist of worms to groundhogs.. depending upon the plans for said soil, It could be helpful with the worms, but the plans could be altered by the groundhog.. but referring to the original question, It definitely loses it's value when it's stripped by wind and water.
The answer is computer. A computer is made up of microchips (CPU and GPU), an operation system (macOS or Windows), input methods (keyboard and mouse), and other parts.
