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A cell membrane has a resistance and a capacitance and thus a characteristic time constant.
What is the time constant of a 8.5 nm -thick membrane surrounding a 3.8 x 102 mm -diameter spherical cell? Assume the resistivity of the cell membrane as 3.6 x 106 m and the dielectric constant is approximately 9.0.
A uniform, spherical cloud of interstellar gas has mass 2.0Ã-1030 kg and radius 9.0Ã-1012 m, what will be the star's rotation period
A string, which has a mass of 0.50 kg and a length of 3.0 meters, is clamped on both ends. If the tension in the string is 25 Newtons, what are the lowest 3 natural frequencies of oscillation of the string? For each case, include a sketch of the s..
A thin thread is wrapped around a pulley of moment of inertia I and radius R, and is connected to an object of mass M. You release the mass from rest, and I would like to know the acceleration of the object as it falls, in terms of M, I, R, g.
Explain how does that compare with the heat needed to reaise the temp of the same mass of water through the same temp difference?
Assume you are standing on a straight high way and watching a car moving away from you. The air is perfectly clear, and after awhile you see only one taillight. Suppose the diameter of your pupils 4.0mm and the index of refraction of your eye is 1.38..
The efficiency of a particular Carnot engine is 0.310, Find the temperature of the low-temperature reservoir
A suitcase falls out of an airplane which is 400 meters above the ground. What is the time it takes for the suitcase to reach the ground
A tennis player, when performing a serve, applies an average force to a tennis ball of 525 N to a 55 g ball. What is the speed of the ball as it leaves the racket
Two large speakers broadcast the sound of a band tuning up before an outdoor concert. The speed of sound on this particular day is 336.2 m/s. how far must he walk between "loud" spots
A ball is thrown horizontally from the top of a house 35 meter high. Obtain what is the time that the ball is in flight
The cop measures you from behind as you move away from the police car. He measures a frequency of 3.5 kHz coming back after the wave is reflected off your car. How fast were you moving?
A container holds 1.4 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.2x10-3 kg bullet with a speed of 780 m/s
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