For the following sections assume concrete of compressive strength of 6,000 psi and reinforcing steel bars with yield strength of 60 ksi to calculate a. the moment of inertia of the uncracked transformed section b. the cracking moment c. the stresses in the steel and concrete right after cracking d. the stresses in the steel and concrete when the moment is 40% of the cracking moment e. the stresses in the steel and concrete when the moment is 140% of the cracking moment f. would the cracking moment be the same for positive and negative moments? justify your answer for each beam.

When does your body conduct current more readily?

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

The movement of electrons between atoms is called an