Chemistry, 06.11.2020 19:40, brendahndz8676
Which of the following describes a study that is "longitudinal"?
A study that follows people for an extended period of time to see if they develop a disease or condition.
A study that looks at people in one location, to reduce any bias introduced by varying locations.
A study that follows people taking a drug or placebo for 6 weeks to see if they develop a disease or condition.
A study that follows people taking medication in different locations, to see if their location impacts the medication's effectiveness.
Answers: 1
Chemistry, 21.06.2019 20:00, Britny2386
2h2s + 3o2 2so2 + 2h2o which option gives the correct mole ratios? h2s: so2 = 2: 2 and o2: h2o = 3: 2 h2s: so2 = 2: 3 and o2: h2o = 3: 2 h2s: so2 = 4: 4 and o2: h2o = 5: 4 h2s: so2 = 4: 6 and o2: h2o = 4: 4
Answers: 1
Chemistry, 23.06.2019 00:30, ejuarez2020
When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two
Answers: 2
Which of the following describes a study that is "longitudinal"?
A study that follows people for an...
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