Question 6 of 20 A girl swings a yo-yo around in circles. How can she increase the total energy
of this system?
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A. Reverse the direction of the swing,
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B. Stand on a table while swinging the yo-yo.
C. Sit on the ground while swinging the yo-yo.
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D. Swing the yo-yo at a lower speed,
SUBMIT

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca

The footprint of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils a.body b.amber c.trace d.index