The compound wooden beam is connected together by at bolt at b. assuming that the connections at a, b, c. and d exert only vertical forces on the beam, determine the required diameter of the bolt at b and the required outer diameter of its washers if the allowable tensile stress for the bolt is (sigma t)allow = 150 mpa and the allowable bearing stress for the wood is (sigma b)allow = 28mpa. assume that the hole in the washers has the same diameter as the bolt.

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2d

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i am not 100% sure but i think it is a.)

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in baseband transmission the whole bandwidth of the cable is utilized by a single signal. eg.Ethernet is using Basebands for LAN.

In the broadband transmission, multiple signals are sent on multiple frequencies simultaneously using a single channel. eg.Digital Subscriber Line (DSL)