Biology, 13.07.2019 12:30 lashaydews12
Astudent is measuring the effects of an electric circuit on a compass, and he is testing to see if increasing the current will cause the compass needle to change its direction faster. he does one trial using a 9-volt battery and another trial using a 1.5-volt battery. he takes accurate data. based on good experimental design, which would improve his experiment? he should repeat the test with three additional batteries of varying voltages to demonstrate the reproducibility of results. he should use batteries of the same voltage but from different manufacturers, to show he has used different variables. he should add a nonworking compass to act as a control. he should use only one battery but do several trials, using different circuit designs to ensure he has appropriate test groups.
Answers: 1
Biology, 21.06.2019 14:30
Which one of these is a involving in both sexual and asexual reproduction
Answers: 2
Biology, 22.06.2019 02:20
Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?
Answers: 3
Biology, 22.06.2019 02:30
'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.
Answers: 3
Biology, 22.06.2019 05:30
Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology
Answers: 1
Astudent is measuring the effects of an electric circuit on a compass, and he is testing to see if i...
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