A Shear Force Is Applied to a Cube of Glass

question 15

Multiple Choice

A shear force is applied to a cube of glass, 10 cm on a side, such that the top of the cube is displaced sideways relative to the bottom. If the shear force is 10 000N, by how much does the top of the cube move relative to the bottom? The shear modulus of glass is 3x1010 N m-2.

• A)0.33 μm.
• B)1.0 μm.
• C)3.3 μm.
• D)10.0 μm.
• E)33.3 μm.

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Definitions:

Confederate Group

A group of individuals who are part of an experiment and are instructed to behave in a certain way by the researcher to manipulate the environment.

Placebo

A substance with no therapeutic effect, often used as a control in testing new drugs.

Fake Treatment

A placebo or sham treatment given to participants in research, which has no therapeutic effect.

Demand Characteristic

Cues in an experimental environment that communicate to participants how they are expected to behave.