The inner and outer surfaces of a 0.5-cm-thick, 2-m × 2-m window glass during winter are 10 ◦c and 3 ◦c, respectively.

if the thermal conductivity of the glass is 0.78 w/m·k, determine the amount of heat loss (not the rate of loss) through the glass over a period of 5 hr.

what would your answer be if the thickness of the glass was 1 cm?

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed