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.

Determine β1 given that f’c = 4,000 psi.

A simply supported beam with dimensions of b = 14 in., h = 28 in., d = 25.5 in., and L = 24 ft supports a uniform service (unfactored) dead load consisting of its own weight plus 1.5 kips/ft and a uniform service (unfactored) live load of 0.8 kips/ft. The concrete is normal-weight concrete. Determine the moment due to the factored loads, Mu.