Mechanical Engineering

1)       b)      In general, the differential solid angle dω subtended by a differential surface area dA when viewed from a…

1)      A body at a temperature above absolute zero emits radiation in all directions over a…

1)      The electromagnetic spectrum includes cosmic waves, gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation,…

1)      Whether the convection is force or natural is found out by finding out the ratio…

1)      Natural convection heat transfer on a surface depends on a)      Geometry of the surface b)      Orientation of…

1)       a)      In the absence of other forces, the net vertical force acting on a body…

1)       b)      Boundary conditions:   c)      Initial condition:  d)      Solution:  2)               Dimensionless heat transfer coefficient 3)                     Dimensionless time also denoted by τ…

3)      Criteria for Lumped System Analysis a)      Characteristic length  b)      Biot Number Bi c)      When a solid body is being heated…

1)    Assumptions a)      Steady operation with no heat generation b)      Thermal conductivity k of the material to remain constant. c)      Convection…

1)      The rate of heat transfer from a surface at a temperature  to the surrounding medium at is…