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A potential difference of 76 mV exists between the inner and outer surfaces of a cell membrane. The innersurface is negative relative to the outer surface. How much work is required to reject a positive sodium ion (Na+) from the interior of the cell?
Bowling balls can be made from a variety of substances and are required to have a circumference of roughly 27.0 inches. calculate the thickness of the shell
A liquid with a density of 55 lbs/cubic ft is traveling through a pipe at a velocity of 115 ft/sec and its static pressure is 15 psi, what is its total head in ft
An electron follows a helical path in a uniform magnetic field of magnitude 0.642 T. What is the electron's speed
You've been walking at a steady, and rope pulls up on the sled at a 21 angle. You estimate that the mass of the sled, with your friend on it, is 64 and that you're pulling with a force of 84.0.
One component of a metal sculpture consists of a solid cube with an edge of length 0.211 m. Find the cube\'s mass
A 70-kg stunt pilot pulls out a drive while flying at 50 m/s. If he flies a circular path with a radius of 200 m, what force does his seat exert on him at the bottom of the path
When light with a wavelength of 206 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic energy of 2.57 x 10-19 J. find the wavelength (in nm) of light that should be used to double the maximum kinetic energy of ..
Copper wire has a breaking stress of about 3×108 N/m2. What is the maximum load that can be hung from a copper wire of diameter 0.66 mm
A pump is required to lift a mass of 780kg of water per minute from a well of depth 13.7m and eject it with a speed of 17.9m/s, What must be the power output of the pump
In a typical living cell, the electric potential inside thecell is 0.070 V lower than the electric potential outside the cell. The thicknes of the cell membrane is 010 μm. What is the magnitude and direction of the electric fieldwithin the cell me..
A standard deck of cards contains 52 different cards. How many different poker hands are there
You are lowering two boxes, one on the top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp.
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