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Consider a portable 20cm2 fuel cell operating at 0.75V, 0.6 A/cm2. Suppose the stoichiometry of the anode is 2.0 and that of the cathode is 2.3. The fuel cell is expected to run for 3 days before being recharged. The cathode runs off of ambient air, and the anode runs of of compressed hydrogen.a) Determine the volume of the hydrogen fuel tank required if it is stored as a compressed gas at 200 atm (20.26MPa), 298 K.b) How large would a pure oxygen container need to be if it stored oxygen at 200 atm (20.26MPa), 298 K?Hint: You will need to use to find number of moles used in 3 days. We will also assume that we are considering ideal gases, and so you can use the ideal gas law to solve for volume.
Given a parallel resonant circuit with the following components: a 10mA source with a zero degree phase angle in parallel with a 10k ohm source resistance, a parallel inductor of 80uH with an internal resistance of 1.5 ohms
silicon is doped so that 1 in 10000 Si atoms is replaced by phosphorous atoms. A) Knowing that only 30% of the phosphorous atoms donate electrons at room temperature (30% ionization) , determine the effective doping level and electron concentratio..
A waveform generator is connected to an op-amp which has been setup as a voltage follower. The voltage follower is then loaded with a 50 Ohm resistor. What output impedance setting should the waveform generator use
Find the electric flux density field produced by a uniformly charged infinite cylinder of radius ‘a' using Gauss's law.
The bellows, diaphragm, and Bourdon tube pressure sensors all exhibit second order time response. This means that a sudden change in pressure will cause an oscillation in the displacement and, therefore in the sensor output.
The balanced 60Hz waveform sample that we must modulate is the point where t=4.4ms. The DC voltage from rail to rail is 300V. assume the q axis and a axis are in same direction. The use of mathCAD is recommended.
it is required to establisg a chart for count of nonconformities for a manufacturing process. if 25 units are to be inspected and the total number of the count of nonconformities from all the units is 141, determine the central line and control li..
Calculate the unit step response of the DT systems with the following impulse responses: a-) h[k]= u[k+6]- u[k-10] b-) h[k]= 3^k- u[-k]
A three phase, 25-hp, 440-V, 60-Hz, 1750 rpm, wound-rotor induction motor has the following equivalent circuit parameters: R1=0.20 ohms, X1=1.0 ohms, R2=0.15 ohms, X2=0.8 ohms, Xm=30 ohms. The motor is connected to a three phase, 440-V, 60-Hz supply.
The light from a camera's electronic flash is produced when a high voltage, obtained by charging a capacitor, is applied to electrodes in a xenon-filled flash bulb. To what voltage would a 791. microfarad capacitor be charged by a 7.3. mA current ..
how many decimal numberes can be represented by 10-bits. what is the largest unsigned decimal number that can be represented by 10-bits.
A four-bit binary number is represented as A3A2A1A0, where A3, A2, A1, and A0 represent the individual bits and A0 is equal to the LSB. Design a logic circuit that will produce HIGH output whenever the binary number is greater than 0010 and less t..
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