Given V1 = 4 vpp, R1 = 4 kΩ and Rf = 8 kΩ, find the gain of the amplifier and Vout. Gain = v/v. (Round your answer to 2 decimal places.) Vout = vpp. (Round your answer to 2 decimal places.) In phasor notation, Vout = at an angle of o vpp.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.