Material 1 Has Young's Modulus Y₁ and Density ρ​₁,and Material

question 42

Multiple Choice

Material 1 has Young's modulus Y₁ and density ρ​₁,and material 2 has Young's modulus Y​₂ and density ρ₂.If Y₁ is 30% more than Y​₂ and ρ​₁ is 30% less than ρ₂,which material has the higher speed of sound and how much higher is it?

• A)Material 1 has a speed of sound more than 35% higher than material 2.
• B)Material 1 has a speed of sound 30% higher than material 2.
• C)Material 2 has a speed of sound more than 80% higher than material 1.
• D)Material 2 has a speed of sound 30% higher than material 1.

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Definitions:

Placebo

A substance with no therapeutic effect, used as a control in testing new drugs, or to trigger a psychological benefit in the patient.

Control Group

In an experiment, the group that experiences all aspects of the experiment, including assessments, in a manner identical to the experimental group, except for the manipulation of the independent variable.

Antipsychotic Drug

Medications used to treat psychotic symptoms such as delusions, hallucinations, and disordered thinking, commonly associated with schizophrenia and bipolar disorder.

Experimental Effect

The difference obtained in the dependent variable that occurs as a function of the manipulation of the independent variable.