Compare the true and engineering strain energy density absorbed in the natural rubber in Example Problem 6.2 at an engineering strain of 6.00. Also compare the strain energy absorbed in the natural rubber to that absorbed in the steel specimen in Example Problem 6.5. Note that this stress is a very high one for the steel. You should find that the rubber absorbs much more strain energy per unit volume than the steel does. Explain why rubber can absorb so much energy. For this calculation assume that the natural rubber stress-strain diagram is linear elastic up to the engineering strain of 6.00.
What will be an ideal response?
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A charge of 5.0 pC is distributed uniformly on a spherical surface (radius = 2.0 cm), and a second charge of ?2.0 pC is distributed uniformly on a concentric spherical surface (radius = 4.0 cm). Determine the magnitude of the electric field 3.0 cm from the center of the two surfaces.
A. 30 N/C B. 50 N/C C. 40 N/C D. 20 N/C E. 70 N/C
The dimensional equivalence of the quantity "momentum" in terms of the fundamental quantities (mass, length, time) is:
a. MLT?1. b. ML2T?2. c. MLT. d. MLT?2.
Earth and the Moon could not have condensed from the same materials because they have different densities and compositions
a. True b. False Indicate whether the statement is true or false
Earth's internal layers were discovered by studying the propagation of P- and S- waves through Earth's interior. In comparison to P-waves, the movement of S-waves are
A) faster and compresses and expands the rock as they move through it. B) faster and vibrates rock particles up and down and side-to-side. C) slower and can travel through solid granite, magma, water or air. D) slower and they can only travel through solids, not liquids.