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A 200-N sled of slides down a frictionless hillside that rises at 37° above the horizontal.What is the magnitude of the force that the surface of the hill exerts on the sled?
Manic Episode
a period of abnormally elevated mood, arousal, and energy levels, often seen in bipolar disorder.
Neurotransmitter
A chemical substance released at the end of a nerve fiber by the arrival of a nerve impulse, transmitting the impulse to another nerve fiber, a muscle fiber, or some other structure.
Chronic Depression
A prolonged state of depression that lasts for years, often characterized by persistent sadness and loss of interest.
Norepinephrine
A neurotransmitter and hormone important in the body's stress response, also involved in arousal, alertness, and the regulation of blood pressure.
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