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The air surrounding the piston-cylinder is at 14.7 psi. What is the gage pressure of the air in the cylinder? What is the absolute pressure of the air in the cylinder?
Bleed steam enters this unit at 3000 kPa with a quality of 90% and leaves as a saturated liquid. Calculate 1) The mass flow rate of bleed steam required.
Calculate the thermal efficiency of the cycle and the net work per pound-mass of steam. Net work per pound-mass of steam. The thermal efficiency of the cycle.
Show that the force required to do this is equal to the weight of a length b + v^2/g of chain, when a length b has actually been lifted.
Draw a schematic of this cycle and number all your points. Determine the thermal efficiency of the cycle. Calculate the m dot 1 in kg/hr for a net cycle output of 500MW.
Letting theta = 53 degrees, determine the vertical component of the velocity of A if B is moving downward with a speed vB = 9 ft/s.
A particle which moves with curvilinear motion has coordinates in meters which vary with time t in seconds according to x = 2.9t2 + 5.0t - 3.9 and y = 2.3t - 5.4.
Determine such that a car driving at constant speed v0= 158 mph experiences at A an acceleration with magnitude equal to 1.5g.
How high should the tank be to ensure the ball reaches terminal velocity? Use the number twice as big from the previous question for height and calculate how much time it takes for the ball to reach
Just before arriving to its destination it decelerates at -0.5g and comes to complete stop. what is the time it takes the train to make this 350 mile trip?
The u velocity component of a steady, two dimensional, incompressible flow field is u = 4x + 3y +1. Velocity component v is unknown. Generate an expression for v as a function of x and y.
Collar B slides along the rod so that its distance from O is r = 2.5t^3 - 5t^2, where r and t are expressed in inches and seconds, respectively. Determine the radius of curvature of the path of the c
A vertical hydraulic cylinder has a 125-mm diameter piston with hydraulic fluid inside the cylinder and an ambient pressure of 1 bar.
At the bottom with a height of 0.5 m is liquid water on top of which is a 1 m high layer of gasoline. The gasoline surface is exposed to atmospheric air at 101kPa. What is the highest pressure in th
Determine the components of force Fr, F(theta), and Fz, which the slide exerts on him at the instant t=2s. Neglect the size of the boy.
Determine the maximum steady-state hay temperature for dry hay (q,dot = 1W/m^3), moist hay (q,dot= 10W/m^3), and wet hay (q,dot= 100W/m^3). Ambient conditions are T inf =0 C and h = 25 W/m^2*K.
A cast-iron cylinder of 300mm bore carries a pressure of 30 newtons per square millimetre; what should be its thickness for a unit working stress of 25 newtons per square millimetres.
The µk between the brakes and the wheels is 0.4. If it takes the car 50m to stop, what is the force that must be applied into each break?
A quantity of steam the original pressure and volume being 140 kN/m^2 and 150 litres, respectively, is compressed to a volume of 30 litres, the law of compression being P(V)^1.2 = C.
Determine the power output of the engine in kilowatts and the mass of fuel used/h. How do I solve this if the answers are 98.5 kW and 38.5 kg/h?
A diesel engine uses 54.4 kg of fuel oil/h of calorific value 45 MJ/kg. The thermal efficiency of the engine is 25%. Determine the power output of the engine in kilowatts.
The steam is fed to a turbine the output of which is 4.1 MW. The calorific value of the coal is 28 MJ/kg. Determine the thermal efficiency of the plant.
A petrol engine uses 20/4 kg of petrol/h of calorific value 43 MJ/kg. The thermal efficiency of the engine is 20%. Determine the power output of the engine and the energy rejected/min.
During a test it is found that this represents 28% of the energy put into the plant by means of burning coal in the boilers. The coal used liberates 29.5 MJ/kg. Determine the mass of coal burnt by t
A particle moves along the curve y=(x^2 - 4)m with a constant speed of 5 m/s. Determine the point on the curve where the maximum magnitude of acceleration occurs and compute its value.