The Diagram Shows Three Identical Strings That Have Been Put

question 10

Multiple Choice

The diagram shows three identical strings that have been put under tension by suspending masses of 5 kg each.For which is the wave speed the greatest?

• A)1
• B)2
• C)3
• D)1 and 3 tie
• E)2 and 3 tie

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Definitions:

Random Assignment

is a process used in experimental designs to allocate participants to different groups in a study by chance, minimizing pre-existing differences among those groups.

Pretest-Posttest Nonequivalent Groups Design

A quasi-experimental design involving two groups that are not randomly assigned, with both groups measured both before (pretest) and after (posttest) a treatment or intervention.

Posttest-Only Nonequivalent Groups Design

An experimental design in which different groups are compared only after the treatment or intervention, without a pretest comparison.

Pretreatment Differences

Variations among participants in a study that exist before the intervention or treatment is applied.