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The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, a potential difference of about 0.077 V exists across the membrane. The thickness of the membrane is 7.4 x 10-9 m. What is the magnitude of the electric field in the membrane?
A small droplet of oil with mass of 4.81×10-15 kg is held suspended in a region of uniform electric field directed upward with a magnitude of 7025 N/C
If a capacitance meter applies a charge of 3.0 V across two plates and reads a capacitance of 30 pF, what is the charge on the plates
a tennis ball traveling with velocity v15ms strikes a vertical wall and bounces back at v2-20ms. if the change in the
Consider an isolated metallic sphere of radius R and another isolated metallic sphere of radius 3R. If both spheres are at the same potential, what is the ratio of their potentials
A child looks at his reflection in a spherical Christmas tree ornament 8cm in diameter, and sees his image reduced by half. How long is his face from the ornament.
Find the electric energy density between the plates of a 225-?F parallel-plate capacitor. The potential difference between the plates is 350V
question you wish to create an image that is 10 meters from an object. this image is to be inverted and half the height
A long straight wire carries a 40.0 A current in the +x direction. What is the force on the electron at this instant
an electron and a proton starting from rest are accelerated through an electric potential difference of the same
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, Over what distance must the lens be movable
A particle moves along the x-axis. Its position varies with time according to the expression x(t) = -4t + 2t2, where x is in meters and t is in seconds. a) Determine the displacement of the particle in the two time intervals t = 0 to t = 1 s and t..
A glass sheet 1.40 ?m (micrometer) thick is suspended in air. Calculate the minimum value of the index of refraction of the glass sheet that produces this effect
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