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A capacitor is constructed with plates of area A and separation s. The area between the plates is ?lled with a weakly ionized gas — a very poor conductive medium with resistivity = 10^8 ohms * cm. The density of the gas is so low that it has no e?ect on the capacitance, but this conductive path will discharge the capacitor just as e?ectively as an external resistor. What is the time constant of this circuit?
If a iron core of a collapsing star initially spins with a rotational frequency of fo=3.4 per second and the core radius decrease during the collapse by a factor of 24. what is the rotational frequency of the iron core at the end of collapse
Argon gas enters an adiabatic turbine steadily at 1600kPa and 450 degrees Celsius with a velocity of 55m/s and leaves at 150 kPa with a velocity of 150m/s. determine the exit temperature of the argon
The wavelength of the waves in seawater is 4.80 x10-4 m. While the generator is directed downward, an echo reflected from the ocean floor is received 10s later.
A car in an amusement park roller coaster ride rolls without friction at the top of a hill. The car begins at a height h from the top of a hill. what is the magnitude of the car\'s tangential acceleration
A truck covers 40.0 m in 7.35 s while uniformly slowing down to a final velocity of 3.40 m/s, Find the truck's original speed
In the model of the hydrogen atom created by Niels Bohr, the electron moves around the proton at a speed of 2.20 106 m/s in a circle of radius 5.30 10-11 m. determine the magnetic moment associated with this motion
what speed will the dart leave the gun.
A 20 {rm kg} child plays on a swing having support ropes that are 2.3 {rm m} long. A friend pulls her back until the ropes are 39.0^circ from the vertical and releases her from rest.
By calculation, determine the wavelength of three principal visible lines of hydrogen from energy transitions n=3, 4
An object starting from rest accelerates at 3.00 m/s2for 10.0 s. The object then continues at a constant velocity for 5.00 s. find the objects displacement from the original starting point
a 3.4-cm-diameter circle lies in the xy-plane in a region where the electric field is E=(1300i + 1300j + 1300k) N/C. What is the electric flux through the circle
Dave needs to get groceries from the store, which is a distance of D=2.8km east of his house, What is the direction of Dave's displacement for the entire trip
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