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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.
The mean residence time and volume of each reactor if the removal or conversion of A is 90%. what is the concentration of A and the rate of conversion in each reactor?
If the angle is big, there must be a lot of tension. Thus, as you increase the tension relative to the bird's weight, the wire must sag more and the angle gets larger. which one is the right answer?
Calculate the percent error between these two different functions for a standard deviation value obtained from a) n = 50 b) n = 100 and c) n = 200. (List the Excel formulas you used.)
How many times larger a completely mixed reactor must be than a plug flow reactor for 90% removal or conversion. Please solve the question by numbers and steps and don`t give me links
A particle which moves with curvilinear motion has coordinates in meters which vary with time t in seconds according to x = 2t^2 + 3t - 1 and y = 5t - 2.
Knowing that P= 75 N and Q=125 N, determine graphically the magnitude and direction of their resultant using (a) the parallelogram law, (b) the triangle rule.
A small mechanical part in a complicated machine moves such that its position relative to a fixed frame of reference is given, in cylindrical coordinates, by: r(t) = cost, theta(t) = sin2t, z(t) = c
One kilogram (1 kg) of superheated steam at 300 degrees C and 200 kPa is contained in a rigid tank. One thousand (1000) kJ of heat is transferred to the steam. How much work is done by the steam du
If the dew point is 10 oC, determine the thickness of the insulation (ki=0.05 W/m.K) around the copper pipe to avoid condensation on the outer surface. Assume thermal contact resistance is negligibl
Plot the resulting motion of the mass (you may use any software available to you); Determine the beat frequency. Solve the same problem when Y = 10 mm while all other information remains unchanged.
Weight are removed so that the gas expands according to the relation PV^(1.2)=constant until the final temperature is 100 degrees Celsius. Determine the work done during this process.
It is known that the highest point of the siphon tube is 11 m above the surface of the lake. Is this plan feasible? What is the maximum height that the siphon can overcome?
Determine the motor torque in foot-pounds required to prevent the forearm from rotating under the gripper and part weight.