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4. A lumber has a nominal dimension of 2x4 inches and is tested for 3-point bending with a span of 4 ft. The wood does

4. A lumber has a nominal dimension of 2x4 inches and is tested for 3-point bending with a span of 4 ft. The wood does not get ruptured until the point load reaches 88 lbs. (Note: The 2-inch side of the cross- section remains vertical during the test). What is the modulus of rupture of the wood? (

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