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Estimate the volume of a helium-filled balloon if it is to lift a payload of 1000 kg.The density of air is 1.29 kg/m3 and helium has a density of 0.178 kg/m3.
Lithium
A chemical element used in the treatment of bipolar disorder and other psychiatric conditions to stabilize mood.
Electroconvulsive Therapy
A psychiatric treatment involving electrically induced seizures for therapeutic effect, often used in severe cases of depression.
Depression
A mental health disorder characterized by persistent sadness, loss of interest in activities, and a range of emotional and physical problems.
Treatment
Medical care given to a patient for an illness or injury, aiming to relieve symptoms or cure the condition.
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