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Calculate the preload needed in the belt if a power of 7 kW should be transmitted at 1000 rpm by using only one-half the wrap angle on each pulley.
Calculate the thermal efficiency based on the net work and the heat addition. (Check to make sure that it matches the Carnot efficiency)
Calculate the material removal rate and the cutting time, and estimate the power required. Assume specific cutting energy to be 3.4 hp-min/in^3.
A first-order system with a time constant equal to 10 ms is subjected to a sinusoidal forcing with an input amplitude equal to 8 V. Determine the magnitude ratio for the 100 rad/s forcing case.
Neglecting KE and PE changes and assuming ideal gas behavior, find whether the expansion is internally reversible, irreversible or impossible.
How long will it take to drain the tank completely if it is full initally? Assume the velocity of the water at the tank surface is negligible compared to the velocity through the pipe.
A dredger is pulling sand from the bottom of a harbor and loading it onto a barge. What is the tension on the mooring line that connects the barge to the dredger during these loading conditions?
If it takes 6 seconds for the belt to go from zero to the speed of 3ft/s, calculate the final angular speed of the drum and it's angular acceleration. Assume constant acceleration.
An insulated piston-cylinder device contains 5 L of saturated liquid water at a pressure of 200 kPa. Determine the total entropy change of the water during this process in kJ/K.
Calculate the relative amount of iodine-132 (a/a0) in a patient's body 48 hours after receiving a dose. After determining the value of k, define a vector t= 0, 4, 8, ..48 and calculate the correspon
Estimate the pressure exerted against a sand below the bottom of the surface casing at a depth of 5,500 ft. Assume ideal gas behavior.
The gas is known to have a density of 1.0 ppg at reservoir conditions. Compare the mud density required to drill the second well safely with that of the first.
What pressure would the air on the left need to be pumped to in order to bring the water and mercury free surfaces level?
If I have a 1 meter diameter circular viewing window at the middle of the pool floor, what would be the force required to hold it in place if a bolt is placed at its center of pressure?
Determine the maximum amount of work in Btu/lbm that can be delivered by the turbine. Maximum work occurs during an isentropic process.
Determine the power produced by a simple sprinkler-like turbine that rotates in a horizontal plane at 500 rpm. The radius of the turbine is 0.5 m.
A small box is sliding along a frictionless horizontal surface when it comes to a a circular ramp which meets the horizontal surface tangentially. Determine the initial speed of the box.
An air-standard cycle with variable specific heats is executed in a closed system and is composed of the four processes. Calculate the net work output per unit mass.
Now the valve is opened and helium is allowed to flow into the tank until the pressure reaches 200kPa, at which point the valve is closed. Determine the flow work of the helium in the supply line an
The temperature inside rises. Determine the amount of heat transferred when the steam temperature reaches 500 degrees C?
Kinetic and potential energy effects are also neligible. Determine the exit temperature in degrees celcius and the work input (-Wcv/m), in kJ/kg of refrigerant flowing.
A temperature of 34 degrees celcius and exits at 0.2MPa. If the refrigerant undergoes a throttling process, what is the quality of the refrigerant exiting the expansion valve.
Determine the center deflection of a clamped circular plate subjected to a point load Q 0 at a distance b from the center (and for some theta) using the reciprocity theorem.
A load P = 4,000 lb acting at a point A of a beam produces 0.25 in at point B and 0.75 in at point C of the beam. Find the deflection of point A produced by loads 4,500 lb and 2,000 lb acting at poi
Determine the impulse on particle A by the explosion, the velocity of A relative to B at the instant immediately after the explosion and the time dierence between when A hits the wall and B hits the