Abeam with the following cross section is constructed with concrete of compressive strength of 4,000 psi and three fiberglass reinforcing bars each having a cross sectional area of 0.18 in.2 the bars are elastic with a modulus of 8,000 ksi until they fail in a brittle manner at a strain of 1.2%. a. estimate the mode of failure for the beam at the ultimate condition. is it desirable? justify your answer. b. calculate the nominal moment capacity, μn. c. what strength reduction factor, φ, would you use to calculate the factored design moment?

33: i think it’s b

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia