1. a glass window of width w = 1 m and height h = 2 m is 5 mm thick and has a thermal conductivity of kg = 1.4 w/m*k. if the inner and outer surface temperatures of the glass are 15°c and -20°c. respectively, on a cold winter day, what is the rate of heat loss through the glass?
2. to reduce heat loss through windows, it is customary to use a double pane construction in which adjoining panes are separated by an air space. if the spacing is 10 mm and the glass surfaces in contact with the air have temperatures of 10° c and - 15°c, what is the rate of heat loss from a 1 m times 2 m window? the thermal conductivity of air is ka = 0.024 w/m*k.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.

Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms