Two ropes are spliced together as shown.
A short time after the incident pulse shown in the diagram reaches the splice, the rope's appearance will be that in
A.
B.
C.
D.
E.
Answer: A
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Ocean waves and currents generally form as a result of
A) swells. B) the rotation of the Earth. C) differences in ocean density. D) wind.
Vision Problems: Diego is nearsighted and cannot see things beyond 110 cm from his eyes. What is the focal length of the contact lenses that will enable him to comfortably see distant hills clearly?
A. +50 cm B. -50 cm C. -110 cm D. +110 cm E. -30 cm
When a cold air mass moves into a region occupied by a warm air mass, the contact zone is called
A) a cold front. B) a warm front. C) a stationary front. D) an occluded front.
An aluminum bar (E 5 72 GPa, v 5 0.33) of diameter 50 mm cannot exceed a diameter of 50.1 mm when compressed by axial force P. The maximum acceptable compressive load P is approximately:
(A) 190 kN (B) 200 kN (C) 470 kN (D) 860 kN