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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?
A motor has a disk mounted on its shaft. The disk has a diameter of 1 foot and weighs 60 pounds. Starting from rest, the motor rotates at 350 rpm after 5 seconds. If the motor has a 92% efficiency, determine the input power in watts.
refrigerant 134a is the working fluid in an organic rankine cycle. saturated vapor at 60degc enters the turbine and the
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A system contains a substance that is initially at 100 °C and 1 MPa and it later at 0 °C and 100 kPa. Determine the change in specific enthalpy for the process if the unknown substance is: a) liquid kerosene, b) helium gas (He), c) solid aluminium (A..
what horsepower must be supplied to a pump that operates at an efficiency of 75 to the flow if water t25degc is pumped
consider the steel balls from 5.6 except now the air tempincreases with time as tinft325kat where a 0.1875ks.asketch
Water in a cylindrical container is hanging by a rod from the ceiling at point O shown in the figure. The container is initially full, and initially displaced 20 degree . There is a hole in the bottom where water pours out and the top of the containe..
Calculate the thickness of a nickel foil that was found to transmit 47.8% of the incident power of a beam of Cu Ka radiation. The density of Ni is 8.90 g/cm3.
Determine the corresponding velocity and acceleration of block A.
a 10 kg space probe travels in a straight line with initial velocity 20 ms. the engines apply a force f5t in the
What is the hottest part of Refrigerant in Refrigeration?
Determining Feasibility, At steady state, a new power cycle is claimed by its inventor to develop 6 horsepower for a heat addition rate of 400 Btu/min
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