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The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.85 cm2 and a length of 1.86 cm. A difference in ethanol concentration of 1.66 kg/m3 is maintained between the ends of the cylinder. In one hour, what mass of ethanol diffuses through the cylinder?
A 12.0 kg box resting on the horizontal, frictionless surface is attached to a 5.00 kg weight by a thin, light wire that passes without slippage over the frictionless pulley. The pulley has the shape of the uniform solid disk of mass 2.10kg and diame..
If the phase angle for a block-spring system in SHM is pi/6 rad and the block's position is given by x = xm cos(wt + pi). what is the ratio of the kinetic energy to the potential enery at time t = 0
A tractor pulls a sled of mass M = 1375 kg across level ground. The coefficient of kinetic friction between the sled and the ground is ?k = 0.605, What magnitude of tension in the rope is necessary to move the sled horizontally
An object has a kinetic energy of 257J and a momentum of magnitude 21.8 kg·m/s. Find out the speed and the mass of the object.
The longest "string" (a thick metal wire) on a particular piano is 3.0 m long and has a tension of 300.0 N. It vibrates with a fundamental frequency of 27.5 Hz. What is the total mass of the wire.
q1. a planet of mass 8 times 1024 kg is at location lsaquo -4 times 1011 7 times 1011 0 rsaquo m. a star of mass 7
a proton moves in a circle with a speed of 280 m/s through a uniform magnetic field of 2t directed perpendicular to the circular path. compute the orbital radius of the proton
what is the electric force between the proton and electron inside of a hydrogen atom? What must the speed of the electron be
A marble is rolled down a ramp with a height of .15 m. The marble travels a distance of 1.38 m. What is the velocity of the marble
Suppose you carry a bag of groceries weighing 100 N from your car to your kitchen, a distance of 61 m, without raising or lowering the bag. What is the work done by the force you exert on the bag
A girl is jumping on a trampoline and reaches a maximum height of 3.1 meters, h=3.1m. She has a mass of m = 53kg. what is the spring constant k in N/m of the trampoline
The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ. The average rate of electric energy consumption in one house is 1.0 kW. Find the energy consumption and area required by the solar cell
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