The correct answer is the nervous system, as it monitors stretch at joints and adjusts body movements through proprioceptors. These sensory receptors convey information about body position to the brain, aiding in balance and coordination. The endocrine and circulatory systems do not directly impact this process. ;
The total charge delivered by a current of 15.0 A over 30 seconds is 450 C. This charge corresponds to approximately 2.81 x 10²¹ electrons. Therefore, about 2.81 sextillion electrons flow through the electric device in that time period.
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