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A beam has dimensions of b = 16 in., h = 24 in., and d = 21.5 in. and is reinforced with 2 No. 7 bars. The concrete strength is 4,000 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the compressive stress block is a = 1.323529 in. and the strain in the reinforcement is εs = 0.038423, determine the strength φMn for this beam. Assume the transverse reinforcement is not spirals.

What fraction of ice is submerged when it floats in freshwater, given the density of water at 0°C is very close to 1000 kg/m^3 ?

You can chew through very tough objects with your incisors because they exert a large force on the small area of a pointed tooth. What pressure in pascals can you create by exerting a force of  500 N with your tooth on an area of 1.00 mm^2?

A beam has dimensions of b = 14 in., h = 28 in., and d = 25.5 in. and is reinforced with 3 No. 7 bars. The concrete strength is 7,900 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth to the neutral surface is c = 1.753914 in., determine the strain in the reinforcement.

A flea jumps by exerting a force of  1.20 X 10^-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of  0.500 X 10^-6 N on the flea. Find the direction and magnitude of the acceleration of the flea if its mass is 6.00 X 10^-7 kg. Do not neglect the gravitational force.

A beam has dimensions of b = 14 in., h = 26 in., and d = 23.5 in. and is reinforced with 3 No. 5 bars. The concrete strength is 2,800 psi, and the yield strength of the reinforcement is 60,000 psi. Assuming the reinforcement has yielded, determine the tensile force T in the reinforcement.

Determine β1 given that f’c = 6,700 psi.

A simply supported beam with dimensions of b = 14 in., h = 26 in., d = 23.5 in., and L = 23 ft supports a uniform service (unfactored) dead load consisting of its own weight plus 1.7 kips/ft and a uniform service (unfactored) live load of 1.4 kips/ft. The concrete is normal-weight concrete. Determine the moment due to the factored loads, Mu.      

A beam has dimensions of b = 18 in., h = 26 in., and d = 23.5 in. and is reinforced with 4 No. 6 bars. The concrete strength is 4,000 psi, and the yield strength of the reinforcement is 60,000 psi. Assuming the reinforcement has yielded, determine the tensile force T in the reinforcement.