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
offset method to draw parabola

The EV is to be used for city transportation, it should carry a maximum total load of 325 kg (passengers and cargo). The battery back used will be 365 kg, 44 kilowatt hours lithium

Hill Roads: Alignment Selection and Geometric Design Standards Here, you have already learnt how an alignment of a hill road has to be selected. The selection of a g

Q. Define Oxidation Process? Oxidation is defined as a loss of electrons, as when a metal goes from the metallic state to the corroded state. When a metal reacts with oxygen,

Determine the horizontal component of the force: A force of 80 N is working on a bolt as illustrated in Figure. Determine the horizontal and vertical components of the force.

The Make Group of Euler Operators The Make group consists of four operators for adding some elements into the existing model creating a new one, and a Make-Kill operator for ad

what is principle of gyroscope

Thrust diagrams for the beam: Illustrate the shear force, bending moment & thrust diagrams for the beam illustrated in Figure Figure Solution Vertical compo


Q. Stress analysis requirements? All other lines requiring review by the stress group are to be checked for adequate support, stability, excessive movement, etc. Where hand ca