Atimber beam ab of length l and rectangular cross section car- ries a single concentrated load p at its midpoint c.

(a) show that the ratio tm/sm of the maximum values of the shearing and nor- mal stresses in the beam is equal to h/2l, where h and l are, respectively, the depth and the length of the beam.

(b) determine the depth h and the width b of the beam, knowing that l 5 2 m, p 5 40 kn, tm 5 960 kpa, and sm 5 12 mpa.

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!