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?

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.