Design a 4th order high pass Butterworth filter with a break frequency of 1,100 rad/sec with a gain of 15 dB at the break frequency. Use Sallen-Key amplifiers, modified for high-pass operation (i. e., ) ). Hint: you’ll probably need a 3rd OpAmp to get the overall gain correct.

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.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux