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Let p be a prime number, and let x > 1 be any positive integer. Consider a wheel with p spokes shown in Figure 4.2.
(a) We have paints of x different colors. How many ways are there to color the spokes if we want to use at least two colors?
(b) How many ways are there to do the same if we do not consider two paint jobs different if one can be obtained from the other by rotation?
(c) What theorem of number theory does this prove?
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An electric 50 L hot water tank is initially full and has a temperature of 90 degrees C. Water is drawn from the tank at a rate of 0.08 kg/s. The shower is used for 10 minutes (cold and hot water are mixed). After the shower the water in the tank is ..
Determine the work and the heat transfer in the process.
an airplane heading eastward is observed to be in a 20degree climb at a speed of 1200kmh. at this instant its
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