haileyparrill703
23.03.2020 •
Physics
The class experiment demonstrates that one can bounce a yttria-stabilized zirconia ball without fracture. Although each bounce can cause a crack to propagate, the contact stress triggers the tetragonal-monoclinic transformation, which is accompanied by volume expansion, thereby causing the crack to close and hence no failure of the ball. Predict what may happen if one were to bounce this ball many millions of times. Justify your prediction.
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Ответ:
d
explanation:
v=uf/(u-f)
= 5.10/(5-10) convex lens has positive focal length
=50/-5
=-10 cm (formed at other side)