Answer: The statement above is absolutely true.
Explanation: During our sleep we pass through five stages of sleep. 5th stage of the sleep is of great importance and is known as REM sleep aka rapid eye movement sleep. During this stage heart rate, breathing and eye movement increases. According to the researchers of Neuro-scientists Rem sleep helps the brain rewire itself and integrates new memories and train the mind for important tasks to be done next day.
Answer:
The answer is "Specific Phobia."
Explanation:
Specific Phobia- This is a type of anxiety disorder wherein a person shows irrational fear when being exposed to a particular object. In response to this, <u><em>the person stays away from that object under whatever circumstance.</em></u> An example of this is the fear of snakes (Animal Phobia) or the fear of trees (Natural Environment Phobia).
The prevalence of this phobia in the United States is 9.1%. This is close to the 9% mentioned in the statement above. So, this is the answer.
<u>Additional Information:</u>
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Agoraphobia- Fear of going to crowded places or even leaving the house. Around 0.9% of people in the United States experience this condition yearly.
Social Anxiety- Fear of being exposed to social situations. Around 7.1% of people in the United States experience this condition yearly.
Post-traumatic Stress Disorder (PTSD)- A person with this disorder experiences flashbacks, severe anxiety and nightmares when exposed to the fearful event. Around 3.5% of people in the United States experience this condition yearly.
<span>The usual answer (and correct) is to improve on the insulation, for example by covering the calorimeter, and using two cups, one inside the other.
Further improvements can be made
1) carrying out the experiment over as short a period of time as possible. reason; any calorimeter will loose heat, but the shorter the time allowed, the less heat will be lost.
2) Use a larger calorimeter, with greater volume of solution. reason; the greater the solvent mass requires more energy to obtain the same change in temperature. You get a smaller temp change for the same reaction, so less losses to the surroundings.
3) calibrate your calorimeter heat the same volume of pure water to a similar temperature as that which the reaction produces. Then determine the rate of heat loss over a period of time, say take temp every minute for 30 minutes, and plot a graph. This will give you a calibration curve that you can use to apply a correction for your calorimeter.</span>
