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Q. Using a diesel fired boiler with an efficiency of 80%.How many liters of diesel is required to produce 1000kg of steam at 120degrees Celsius from make up water at 20 degrees Celsius.given that the enthalpy of steam at 120 degrees Celsius is 2706.3kJ/kg,enthalpy of water at 20 degrees Celsius is 83.9kJ/kg, heat of combustion of diesel is 45000J/kg and density of diesel is 850kg/m3?
Q. The emissivity of tungsten is 0.35. A tungsten sphere with a radius of 1.50cm is suspended within a large evacuated enclosure whose walls are at 290K. What power input is required to maintain the sphere at a temperature of 3000K if heat conduction along the support is neglected?
In this week's video, Bill Goodykoontz talks about morality and ethics in pop culture. The freedom of speech and expression allows the variety of pop culture media to be released, which may sometimes be offensive material. Can pop culture still have ..
What is work done by the non-conservative force
A small boat is moving at a velocity of 3.35 m/s while it is accelerated by a river current perpendicular to the initial direction of motion. If current acceleration is 0.750 m/s^2, what will the new velocity of the boat be after 33.5 s.
What fraction of the power radiated by the sun is intercepted by the planet Mercury? The radius of Mercury is 2.44 x 106 m, and its distance from the sun at the moment is 5.75 x 1010 m. presume that sun radiates uniformly in all directions.
A 2.46 x 10-2-kg block is resting on a horizontal frictionless surface and is attached to a horizontal spring whose spring constant is 110 N/m. The block is shoved parallel to the spring axis and is given an initial speed of 10.4 m/s, while spring is..
Find the energy, in joules, of one quantum of energy for an atomic oscillator in a block of aluminium.
An airplane is flying in a horizontal circle at the speed of 542 km/h. If the wings of the plane are tilted 33.0° to the horizontal, what is the radius of the circle in that the plane is flying? Suppose that the required force is provided entirely by..
The two springs each have a spring constant of 11. They are stretched by 1 as a current passes through the wire. How big is the current.
A car is traveling at a constant speed of 38.8m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has constant acceleration. What acceleration must it..
A 3000 flask is initially open while in a room containing air at 1 and 20 . The flask is then closed and immersed in a bath of boiling water. When the air in the flask has reached thermodynamic equilibrium, flask is opened and air is allowed to esc..
The lens has a refractive index of 1.30. Find out the difference Δx in the positions where each crosses the principal axis.
Describe the displacement of the airplane when the radar was tracking it-RBA=RB-RA. What are the components of RBA.
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