41. Which of the following is a case of steady state heat transfer?
42. Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium.
43. Fourier's law of heat conduction gives the heat flow for
44. In a shell and tube heat exchanger, baffles are provided on the shell side to
45. A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100°C and leaves at 60°C. A cold fluid enters the heat exchanger at 40°C. The mean temperature difference between the two fluids is
46. If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ and λ + dλ is represented by (eλ.dλ), then eλ is called
47. The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as
48. The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called
49. Fourier's law of heat conduction is valid for
50. According to Newton's law of cooling, the heat transfer from a hot body to a cold body is
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