You are measuring the pressure with a sensor embedded in a bridge. The bandwidth of the sensor is only 30 Hz, which means it can only measure changes less than 30 times a second. However, there is a 60 Hz high power power line nearby that might affect the signal acquisition. To reduce the induced noise to minimum, which type of filter should be used?Design a filter that can filter out all the noises with a 10 kΩ resister.

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)