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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?
When a pulse is amplified in a linear amplifier, the charge carrier transmit time can cause.
Find out the work completed by neoconservative forces in stopping plane. At the nozzle exit, diameter is 2.5 cm and the density is 1.29kg/m^3. What is the speed of the air as it leaves the nozzle.
An object falls because of gravity at a rate of -9.80 m/s2 (- sign is indicative of a downward direction) for 10.00 Seconds. If it starts from rest (vo= 0) and its position starts from do= 0.0, where is it 10.00 Seconds later.
Consider the four masses. Find the total gravitational potential energy of this system. How does your answer to part A change if all the masses in the system are doubled.
Calculate for the capacitance, the charge of plate, and magnitude of electric field between the plates for a capacitor whose plates are 11 mm apart are 2.00 m-2 in area and being connected to a source with potential difference of 270V.
Dan is gliding on his skateboard at 4 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 6 m/s (as measured by an observer on the ground). Dan's mass is 50 kg and the skateboard's mass is 7 kg. How fast is Dan going..
How much time is necessary to catch the car
A 100 kg crate is being pushed across the horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.230. What must be the magnitude of, so that the net work completed by it and the kinetic..
A football spends a total of 5 seconds in the air. It reaches a peak height of 30 meters. How long does it take to reach its peak height? The football has the range of 90 yards. What is its horizontal velocity.
How to compute for the density of dark matter estimate mass density of dark matter in the solar neighbourhood. Express the answer in units of kg m-3, Msun pc-3, Msun AU-3.
While Voyager 2 sent back pictures of Neptune during its historic flyby of that planet in 1989, the spacecraft's radio signals travelled for 4 hours at the speed of light to reach Earth. How far away was the spacecraft.
At one instant a bicyclist is 75m due east of a park's flagpole, going due south with a speed of 13.0 m/s. Then, 10s later, the cyclist is 65 m due north of flagpole, going due east with a speed of 20.0 m/s.
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