Afurnace that has a 40-cm 3 40-cm glass window can be considered to be a blackbody at 1200 k. if the transmissivity of the glass is 0.7 for radiation at wave- lengths less than 3 mm and zero for radiation at wavelengths greater than 3 mm, determine the fraction and the rate of radiation coming from the furnace and transmitted through the window.

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

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.