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Compute the number of free electrons per cubic meter for silver at room temperature. Compute the number of free electrons per silver atom.
If a section of concrete is poured for a road and the engineer leaves no gap between sections poured before and after the section, what will happen to the concrete if the temperature varies from 0 C
Two clockwise rotating point vertices of strength 8 ft^2/s are located at (0,0) and (0,3) at a given instant (a) find their location after 1.0 s (b) if the sense of the vortex at the origin is reve
Assuming both air flows to be steady, inviscid and incompressible, and neglecting body forces and weight of the cylinder, determine the magnitude and direction of the net force acting on the cylinde
Determine the location of the stagnation point xo as a fucntion of V and m. (b) Determine the static pressure variation along the wall as function of x (c) sketch the resultant pressure distribution
If the coefficient of friction is 0.3, how long does it take the blocks to come to rest? what is the maximum velocity of B? A's mass of 50 kg and B mass of 30kg.
It is then machined down to a 80mm diameter determined the difference in angular momentum. Assume the wood weighs .00084 kg/cm3.
A pulp and paper machine has a roller that has a mass of 400 kg and a mass moment of inertia about its center of rotation of 30kgm2.
A spring is initially compressed 50 mm by a force, P. if P is increased by 250 N thereby causing a total spring compression of 150 mm what is the spring constant.
A torque of 40Nm is applied to a 100 kg armature of an electric generator for 3 seconds. If the speed increase is 400rpm determine the radius of gyration of the armature.
If the coeffiecient of firction is 0.3 how long does it take the blocks to come to rest. what is the max velocity of the 30kg block.
Using psychrometric chart, determine a. the relative humidity b. the humidity ratio c. the enthalpy d. the wet-bulb temperature e. the water vapor pressure.
The nitrogen is now allowed to cool at constant pressure until the temperature drops to 77 degrees celcius. U sing data from the nitrogen tables determine the heat transfer.
Determine (a) the power input to the compressor, in kW. (b) the heating capacity of the system, in kW and tons. (c) the coefficient of performance. (d) the isentropic compressor efficiency.
The overall efficiency of the turbine-generator is 80 %. Disregarding frictional losses in piping, estimate the electric power output of the plant.
Five kg of water contained in a piston-cylinder assembly expand from an initial state where T1=400 C, P1=700 kPa to a final state where P2=300 kPa. If this is done during an adiabatic process with i
Neglecting kinetic and potential energy effects and ignoring heat transfer from the outside of the condenser, determine the volumetric flow rate of the entering cooling water.
The distribution of velocity in the water near the top of the bubble is known to approximately the same as if the bubble were a complete sphere of radius R. Use Bernoullis theorem to show that the r
What is the the required pump horsepower, total pressure drop, and pipe diameter using iterative methods to solve and taking minor losses into effect?
If the rate of heat transfer is 0.3 Btu/s, determine the time in min for the process of water to occur. Kinetic and potential energy effects are negligible.
Steam at 550 degree Celsius, 17.5 MPa enters the high-pressure turbine of an ideal reheat Rankine cycle.The steam mass flow rate is 50 kg/s. Determine the thermal efficiency of the cycle and net power
Determine the molecular weight of the mixture and he compressibility factor. The critical temperature for the mixture is given to be 192.75 deg K and the critical pressure is 48.9 bar.
If the actual coefficient of performance is only one quarter of the maximum value, how much power is needed to run the heat pump? State all assumptions associated with your solution.
What is the amount of heat supplied to the cycle? What is the amount of heat removed from the cycle? What is the thermal efficiency?
Damp fabric of 60% moisture by mass enters a dryer on a conveyor belt. The dryer is operating at steady state. What is the volumetric flow rate of entering dry air in cubic feet per hour.