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Calculate the capacitance per unit length of an axon of radius 4.5 µm. The membrane acts as an insulator between the conducting fluids inside and outside the neuron. The membrane is 5.3 nm thick and has a dielectric constant of 7.0. (Note: The membrane is thin compared to the radius of the axon, so the axon can be treated as a parallel plate capacitor.)
What is the magnitude of the charge density on the surfaces of the membrane?
If a Mack truck with a mass mt = 20000 kg and a Honda Civic with a mass of mc=2000 kg have a head on collision and force upon the Mack truck is 1000 N
what would the period of the system be. When a particular mass-spring system is started by stretching the spring 5 cm, one complete oscillation takes 2 seconds.
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 5.85 m/s. Ignore frictional losses. What is the height of the hill
A closely wound, circular coil with radius 2.10cm has 830 turns. What must the current in the coil be if the magnetic field at the center of the coil is 5.00×10?2
Two spheres are launched horizontally from a 1.1m-high table. Sphere A is launched with an initial speed of 4.5 m/s. What is the time for the sphere A to hit the floor
A 6 kg block, starting from rest, slides down a frictionless incline of length 2 m. When it arrives at the bottom of the incline its speed is vf. At what distance from the top of the incline is the speed of the block 0.5 vf.
A spring-loaded pellet gun is designed to fire 3.50 g projectiles horizontally at a speed of 39.1 m/s. What maximum force is required to load the gun
question1two window washers bob and joe are on a 3.00 m long 380 n scaffold supported by two cables attached to its
A 45 kg girl is standing on a 130 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.33 m/s relative to the plank.
Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward the first at 20 m/s, What does the frequency the horns emit
A mirror creates an image of magnification ?1/3. (a) Is the image upright or inverted? (b) If the object is 7.75 cm tall, what is the height of the image
A runner wearing spiked shoes pulls a 24kg sled across frictionless ice using a horizontal spring with spring constant 130N/m. What is the acceleration of the sled
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