Tensile strain is
A) the ratio of the change in length to the original length.
B) the stress per unit area.
C) the applied force per unit area.
D) the ratio of stress to elastic modulus.
A
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A crate is sitting in the center of a flatbed truck. As the truck accelerates to the east, the crate moves with it, not sliding on the bed of the truck. In what direction is the friction force exerted by the bed of the truck on the crate?
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Which of the following statements is not true about the Standard Model?
A diffraction grating is essentially many Young's double slits side by side. If the number of slits is changed from 2 to 50 but the distance between each slit remains the same, how does the interference pattern change?
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