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A copper atom contains 29 electrons, one of which is a conduction electron. Copper has an atomic weight of 64 and a density of 8.9 x 10^3 kilograms/meter^3. Suppose that you have two copper spheres, each one having a volume of 1 centimeter^3. The spheres are depleted of their conduction electrons and separated by a distance of 100 millimeters.
a.Calculate the force of repulsion. Show that this force is equal to about 0.5% of the force of attraction between the sun and earth.
b.Calculate the energy stored in one sphere. That is the energy required to remove the conduction electrons.
c.How much would this energy cost, at 10 cents per kilowatt-hour?
d.To obtain this energy, you build a large nuclear reactor that can supply one gigawatt of electric power. How many years will it take to generate that energy
A crystal with a simple cubic lattice and a monoatomic basis has an atomic radius of 2.5 angstrom and an atomic weight of 5.42. Calculate its density assuming that the atoms touch each other.
Assuming the bandgap of GaAs, Eg1 = 1.424 eV and that of AiAs, Eg2 = 2.671 eV, find the required AI - fraction x in AIxGa1As compound to fabricate the material for red light emission with the wavelength lambda = 652 nm.
The system uses a 7-cell reuse pattern. If the offered traffic per user is 0.03 Erlangs and the average number of calls per hour per user is 1.5, for an Erlang-C system with a probability of delaying a call being 5%, calculate the traffic load per..
What is the input to our control system called - What would we expect its final value to be (the value as time approaches infinity) - Determine the equation that linearizes the sensors output between temperatures of 0oC and 100oC.
Heat is added until the final volume is twice the initial volume. Assume that Helium behaves as an ideal gas. Use the table provided to determine the specific heats of helium and determine the following. Find the temperature at the final state.
What is the rate at which the electric field between the plates is changing?
A 1.80kg , horizontal, uniform tray is attached to a vertical ideal spring of force constant 195N/m and a 290g metal ball is in the tray. The spring is below the tray, so it can oscillate up-and-down.
A frictionless piston-cylinder device contains 16 lbm of superheated water vapor at 40 psia and 600°F. Steam is now cooled at constant pressure until 70 percent of it, by mass, condenses. Determine the work done during this process.
An inductor rated at 4 Henrys is subjected to a sinusoidal AC voltage of 24 volts RMS, at a frequency of 60 hertza) Write the formula for calculating inductive reactance (XL), and solve for current through the inductor.
Sketch the spectrum of this signal indicating the complex size of each frequency component. You do not have to make separate plots for real/imaginary parts or magnitude/phase. Just indicate the complex phasor value at the appropriate frequency.
In a DSB-SC amplitude modulation system, the message signal is m(t)=e^-3t*u(t-2) and the carrier signal is cos(2000pi*t). Find and sketch the Fourier transform of the modulated signal.
Design a 4 input, 1 output combinational circuit. the input represents a 4-bit number, N = X3X2X1X0, which ranges from 0 to 15. The output, PN is 1 when N represents a Prime Number,PN, otherwise PN is 0
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