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The membrane that surrounds a certain type of living cell has a surface area of 4.00 10-9 m2 and a thickness of 1 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.
(a) If the potential on the outer surface of the membrane is +46.0 mV greater than that on the inside surface, how much charge resides on the outer surface?
(b) If the charge in part (a) is due to K+ ions (charge +e), how many such ions are present on the outer surface?
A square panel with sides of length 8 inches is 1 inch thick and has a thermal conductivity of 0.53 W K?1 m?1. find the rate of heat transfer through the thickness of the panel
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A 2.0kg block of wood sits on a table. A 3.0 g bullet, fired horizontally at a speed of 360m/s, find the speed of the block immediately after the bullet exits
A flat horizontal surface with an area of 505 cm2 is inside a uniform electric field of 1.40×104 N/C. What is the electric flux through the surface
A cannonball is fired from a gun and lands 740 meters away at atime 20 seconds. What is the x-component and y-component of the initialvelocity? The maximum height of the cannonball?
Determine the magnitude of door's angular acceleration.
A 50.0 stunt pilot who has been diving her airplane vertically pulls out of the dive by changing her course to a circle in a vertical plane. What is the apparent weight of the pilot at the lowest point of the pullout
An object with a net charge of 44 µC is placed in a uniform electric ?eld of 554 N/C, directed vertically. The acceleration of gravity is 9.81 m/s^2. What is the mass of this object if it ?oats in this electric ?eld?
Bicyclists in the Tour de France do enormous amounts of work during a race. How much work does he do during a 177-km race in which his average speed is 12.7 m/s
A uniform solid sphere of mass 1.5 kg and diameter 30.0 cm starts from rest, What is the speed of the center of mass of the sphere when it reaches the bottom of the incline
Squids rely on jet propulsion to move around. A 1.7 squid drifting at 0.50 suddenly expels 0.11 of water backward to quickly get itself moving forward at 2.4. If drag is ignored over the small interval of time needed to expel the water (the impulse a..
A person exerts a horizontal force of F = 169N in the test apparatus. (h = 0.32m.) Find the horizontal force M that his flexor muscle exerts on his fore arm.
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