<span>During a sleep study electrodes are attached to the scalp, near the chin, near the eyes, on the upper chest, and the lower legs. Sensors are also attached to the upper lip and either the finger or the ear. The electrodes on the scalp measure brain waves or EEG to monitor the different stages of sleep. The electrodes near the eyes record eye movement and the electrodes on the chin record muscle activity to also provide data for determining sleep stages. The upper chest electrodes monitor heart activity. The lower leg electrodes show leg muscle activity during sleep. The upper lip sensor monitors breathing. The sensor on the finger or ear tell the doctor about the oxygen levels in the patients blood. Various other sensors may be used for studying specific areas of concern t the discretion of the sleep lab technician.</span>
<h2>B: the amount of moisture in the Earth’s atmosphere. </h2>
As by definition humidity is the concentration of water vapours in the air. So the best answer is B.
Well no one would be able to think for them self i gess
Peace and justice. Everyone waits 'world leader' to save the world.
Answer: The reading on the scale will decrease as the elevator descend.
According to Newton's second law of motion which explains that the rate of change of the momentum of a body is directly proportional to, and in the same direction as, the net force acting on it.
In essence as a body moves towards ground, it weighs less and even weighs more upon impact with the ground.
If peradventure, the whole system is in free fall, you, the elevator and the scale will weigh nothing at all.
