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A model of the stretching vibrations of a polyethylene chain may be made by considering a linear chain of identical masses M connected by springs of alternating force constants C1 and C2. Calculate the characteristic frequencies of such a chain is the repeat distance is a and the force constants are related according to C1 = 5C2. Obtaining values for w as k -> 0 and k -> pi/a, sketch the dispersion curves for the optical and acoustic branches of the vibration spectrum.
Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^?2cm, Find its speed (vfinal) when it strikes the anode
The near point of a naked eye is 25 cm. When placed at the near point and viewed by the naked eye, a tiny object would have an angular size of 5.2 10-5 rad. Find the focal length of the eyepiece in cm
An electric water heater operates at 66 A and 16 kilowatts, Calculate N (the total number of resistors) and the cost of manufacturing the heating element if in a pack of 100 resistors cost $0.50
Find the x and y components and the magnitude and direction of the electric field at the following points. Find the x and y components and the magnitude of the electric field at the origin.
The side-view mirror of an automobile hasa radius of curvature of 11.5 cm. How far is the object from the mirror
Sheena can row a boat at 3.01 mi/h in still water. She needs to cross a river that is 1.26 mi wide with a current flowing at 1.43 mi/h. How long does it take her to cross the river
A cylinder of gas is at room temperature (20°C). What is the new pressure of the gas relative to its initial pressure
Start from the expression of the electric filed outside an infinite sheet of uniform surface charge density, E=sigma/2epsilon, derive the electric field
A 250 N beam hangs from a cable. The beam moves at a constant velocity. What is the force on the cable
an object is thrown upward to a person of a roof . at what point is the objects kinetic energy at its max? at what point is the potential energy of the system at a max
One gallon of gasoline contains 3.1 107 calories of potential energy that are released during combustion. what is the average force produced by the gasoline
1.give the definition of electrical circuit. draw the simplest electrical circuit and mark the directions of electrical
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