Difference between the open and closed systems, Mechanical Engineering

Provide short answers to the following questions:

a)   What the necessary condition for a heat transfer process to occur?

b)   What is a difference between the steady state conditions and the thermal equilibrium state?

c)   Is it possible for the steady state temperature profile in a plane wall to be nonlinear at steady state? If yes, provide one example.

d)   Why do you feel cooler during a windy day than during a calm day even though the air temperature is the same?

e)   Why it is more likely to get burn by putting a bare hand into boiling water at 100oC then into hot air at 200oC?

f)   What is a temperature gradient within an object sitting in a room in which the temperature is maintained constant after a sufficiently long time?

g)   Is it possible that the surface temperature of the object from part f) to be different than the room air temperature? If yes, please explain why?

h)   What is the primary reason for a ground frost (air temperature is greater than zero)? For a given air temperature, is ground frost more likely to occur at windy or calm conditions?

i)    What is a difference between and opaque and semitransparent object?

j)    What is the primary reason for the surfaces of different objects to be different when they exposed to sunlight?

k)   What is the difference between the open and closed systems?

l)    What is the inherent difference between application of conservation of energy over a time interval and at an instant of time?

m)  Why the form of the energy balance for a surface of an object at steady and unsteady state conditions is the same?

n)   What is the primary reason irreversible operation of the actual heat engines?

o)   What is the effect of the power output of the actual heat engine on its efficiency? Please explain.

Posted Date: 3/19/2013 1:28:38 AM | Location : United States







Related Discussions:- Difference between the open and closed systems, Assignment Help, Ask Question on Difference between the open and closed systems, Get Answer, Expert's Help, Difference between the open and closed systems Discussions

Write discussion on Difference between the open and closed systems
Your posts are moderated
Related Questions
Calculate the final velocities of the two masses: A mass of 10 kg moving along with a velocity of 10 m/sec along x direction follows another mass of 4 kg moving with 5 m/sec i

what is the difference between intrinsic and extrinsic process?

Which software is worth in learning for upcoming technologies in mechanical field?

Find the coefficient of friction between ladder and floor: A ladder of 5m long rests on horizontal ground and leans against smooth vertical wall at an angle of 70° with the h

Match plate pattern These are extensions of the previous type. Here the cope and drag patterns along with the gating and the risering are mounted on a single matching metal or

Q. Can you explain Investment casting? -Investment casting produces very high surface quality and dimensional accuracy. -Investment casting is commonly used for precision eq

Q.  An I section has dimensions Top flange = 8 cm × 2 cm; Bottom flange = 12 cm  × 2 cm; Web = 12 cm × 2 cm; Over all the depth of section = 16 cm. Determine M.I. of  I s

Lean Mixture: It generally ranges from approximately 15 : 1 to 17 : 1. By the use of this fuel, engine runs for higher economy.

Angular Dimensions There is only one command in this section and it is used to annotate angular measurements. The Angular Dimension Command The Angular command is amazi