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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.
Explain why a voltage follower implemented with an op-amp is a useful circuit component. Explain how the nature of KCL allows the connection to a single op-amp input of multiple voltage signals, each through a resistor, to perform a summing functi..
For each one of the 3 frequency responses, H(f), in parts (a), (b), and (c) do the following: i. Obtain the system's impulse response, h(t). ii. Indicate if the system is BIBO stable or not, and state why. iii. Indicate if the system is causal or not..
a) Draw the state diagram b) Draw the schematic for the logic to implement this circuit using Inverters, AND gates, OR gates and D flip flops. Use the reverse side and additional sheets if needed.
Draw the ROM truth table for the seven segment
Design a DC power supply that provides -95v +/- 5v to a 2 amp load (energy absorber). The input source is a 100 volt peak sinusoid, 60 Hz. You may use any basic circuit element. State the values of all circuit elements (in ohms, farads, etc).
1. A potentiometer with a total range of 350° is supplied with a voltage of 12 Vdc. Find the output voltage for an angle of 135°. 2. An absolute optical rotary encoder has five tracks. How many bits is the output.
The temperature decreases by 33.8 C°. Determine the fractional decrease L/(LSilver + LGold) in the rod's length, where LSilver and LGold are the initial lengths of the silver and gold rods.
Assume that one of the pumps uses a1/4hp DC shunt motor with an input voltage of 115VDC that pulls 1.6A running at 1500 rpm. The filed resistance for the motor is 600 ohms and the armature resistance is 8.5 ohms. Find the constant KT for the motor..
The two wattmeters read 111 KW and 58 kW, respectively. Calculate the approximate power output in HP, losses and the corresponding power factor of the induction motor. There is an ammeter connected in the line "b".
A reservoir-type small hydroelectric system has a penstock that is 2 m in diameter,The speed of water at exit end of the penstock is 10 m/s.assume that the power coefficient is 40%,the turbine efficiency is 80%
If a computing system needs two 32Kbytes to store its program and 16Kbytes to store temporary data, will a 16-bit address bus sufficient
Evaluate the TL parameters. Include the effect of the earth as ideal. Do not incorporate the effect of the shield wires.
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