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The outer surface the membrane of a spherical cell has a potential which is 60 millivolts higher than the inner surface. The membrane has a thickness of 10^-7 m and the cell has a radius of 2 x 10^-5 m. To a good approximation, the membrane can be considered a parallel plate capacitor with an area given by the surface area of the cell. The dielectric constant of the membrane is 4.0 What is the capacitance of the cell?
If a particle of mass 5.4 kg is moving east at 10 m/s and a particle of mass 19 kg is moving west at 10 m/s, what is the velocity of the center of mass of the pair
A 1.25 m long FM antenna is oriented parallel to the electric field of an EM wave. The eletric field produced from 1.46 mV between the ends of the antenna must be 9.12×10^-4 V/m. What is the rate of energy transport per square meter?
You need a diffraction grating that will disperse the visible spectrum (400nm to 700nm ) through 35.0 degrees in the first-order pattern. What must be the line density of this grating
The verical displacement of a string is given by y(x,t)=(6.00 mm) cos[(3.25m^-1)x-(7.22s^-1)t]. What is the speed of the wave
2 mol of a diatomic ideal gas expand adiabatically and quasi-statically. The initial temp of the gas is 300K, What is the final temp of the gas
A 0.10kg solid rubber ball is attached to the end of a 0.80 m length of light thread. The ball is swung in a vertical circle. Point p, the lowest point of the circle, is 0.20 m above the floor.
A uniform electric field exists in a region between two oppositely charged plates. What is the magnitude of the electric field
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. what is the maximum charge the cloud can hold
Compute the semi major axis of the star orbit
A current of 2.0 A is flowing along the z-axis in the positive z direction from the origin to z=-2 m. Find the magnetic field, Which field is the strongest and Why
At a temperature of 5800, hydrogen atoms in the solar atmosphere have typical random speeds of about 12. Assume that spectral-line broadening is simply the result of atoms moving toward us or away from us at this random speed, estimates thermal width..
A uniform magnetic field points out of the page. The field fully penetrates a wire loop in the plane of the page. what is the averaged induced current
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