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Why are the Balmer lines weak in the spectra of hot and cool stars, but strong in the spectra of intermediate-temperature stars
Stimulant
A substance that raises levels of physiological or nervous activity in the body, typically used to increase alertness, attention, and energy.
Behavior Addiction
A form of addiction involving a compulsion to engage in a rewarding non-drug-related behavior despite adverse consequences.
Internet Gaming Disorder
A condition recognized by excessive and compulsive engagement in video games, leading to significant impairment or distress.
Alcohol Use Disorder
An illness defined by the inability to halt or regulate drinking habits, even when faced with detrimental outcomes in social settings, the workplace, or health.
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