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Determine the maximum efficiency and open circuit voltage for the methane?oxygen fuel cell,
CH4 + 2(O2) → CO2 + 2[H2O(l)],
when each component in the reaction is at 25.0°C and 0.100 MPa.
A father pulls his young daughter on a sled with a constant velocity on a level surface a distance of 10m. how much work does the father do
A pencil, 15.7 cm long, is released from a vertical position with the eraser end resting on a table. The eraser does not slip. Treat the pencil like a uniform rod. What is the angular speed of the pencil just before it hits the table?
if the power generated by a turbine is 20kw, what is the equivalent horsepower of this turbine
A simple pendulum is made of a small blob of mass m = 9.500 kg attached to the end of an inextensible wire. find the magnitude of the tension in the wire
A lump of putty with a mass of 0.210 kg and a speed of 0.830 c collides head-on, What is the mass of the system after the collision
Assume that the interior of the earth can be treated as an incompressible fluid in equilibrium. {HINT: Let ? denote the density; take ? to be a constant; ? = M/V.}
The intensity of the sunlight that reaches Earth's upper atmosphere is approximately 1335 W/m2. What is the average energy density
Two people carry a heavy electric motor by placing it on a light board 1.50{\rm m} long. One person lifts at one end with a force of 370{\rm N} , What is the weight of the motor
A sealed cubical container 22.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 20.0°C
An object moves in SHM with amplitude 4.37 m. The phase constant of the function describing its motion is 1.33 rad. What is the object's displacement at time t = 0 s?
A copper (Young's modulus 1.1 x 1011 N/m2) cylinder and a brass (Young's modulus 9.0 x 1010 N/m2) cylinder are stacked end to end, Find the amount by which the length of the stack decreases
a charge q is uniformly spread over one surface of a very large nonconducting square elastic sheet having sides of
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