A 2.00 µF and a 5.50 µF capacitor can be connected in series or
parallel, as can a 30.0 kΩ and a 100 kΩ resistor. Calculate the
four RC time constants (in s) possible from connecting the
resulting capacitance and resistance in series.
-resistors in series, capacitors in parallel
-resistors in parallel, capacitors in series
-capacitors and resistors in parallel
Please show how to solve! I'm really confused.
In a hydrogen-oxygen fuel cell, gaseous hydrogen serves as the
fuel, oxygen in the air as the oxidizer, and the reaction product
is water. Consider that flat plates of Pt are used as electrodes at
25°C and fuel and air are supplied at 1 atm. [20%] (a) Write the
Nernst expression for each half-cell reaction. (b) What is the
overall cell reaction? (c) Calculate the cell voltage, Ecell, given
the above conditions. (d) Suppose that the supply of hydrogen and...
What is the most up-to-date information on hydrogen fuel cell
use in automobiles in the United States? How many hydrogen fueling
stations are there and where are they?
4-A. Can a fuel cell be both an electrollzer producing hydrogen
and a power source producing electricity and heat?
B. Storage batteries have great potential for storing off-peak
power as well as accommodating ‘green energy’ However they have
serious problems limiting their use. What are they?
A direct hydrogen fuel cell uses hydrogen and air (oxygen) to
produce electricity, as we showed in class.
If you wanted a voltage of 2.2 V for your fuel cell device
(which can be made of multiple cells), what mix of conversion
and/or number of cells would you want to use? Remember: the voltage
of cells in series adds up. There are a variety of possible
answers.
A series RC circuit is connected in parallel to a 5 volt DC
voltage source, where resistance R=1 M ohm and capacitance C= 1
microfarad. If at the start of operation, voltage across the
capacitor is 5 volts, calculate the voltage across the capacitor at
t=2 seconds. Also sketch the instantaneous voltage across the
resistor. using differential equation.