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Author Question: The onset of action for phenolphthalein is approximately: A) 15-30 minutes B) 1 hour C) 6-8 ... (Read 18 times) |
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.