Using offset-nulling facilities provided for the opamp, a closed-loop amplifier with gain of +1000 is adjusted at 25°c to produce zero output with the input grounded. if the input offset-voltage drift is specified to be 20 μv/°c, what output would you expect at 0°c and at 100°c? while nothing can be said separately about the polarity of the output offset at either 0 or 75°c, what would you expect their relative polarities to be?

Steel balls 12 mm in diameter are annealed by heating to 1150 k and then slowly cooled to 400 k in an air att 325 k and h -20 w/m2 k. assume the properties of the steel to be k- 40 w/m k, p 7800 kg/m3, and cp 600 j/kg k. a. determine whether lumped system method can be used to analyze this problem and if so why" b. determine the time required for the cooling process. c. determine the total amount of heat lost from each ball to the ambient air