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A small metal bead (radius 0.5 mm), initially at 100°C, when placed in a stream of fluid at 20°C, attains a temperature of 28°C in 4.35 seconds. The density and specific heat of the metal are 8500 kg/m3 and 400 J/kgK, respectively. If the bead is considered as lumped system, the convective heat transfer coefficient (in W/m2K) between the metal bead and the fluid stream is
  • a)
    149.9
  • b)
    449.7
  • c)
    283.3
  • d)
    299.8
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A small metal bead (radius 0.5 mm), initially at 100°C, when place...
r = 0.5 mm; cp = 400 J/kgk; ρ = 8500 kg/m3; t = 4.35 sec
∵ 
∵ 
⇒ 
⇒ h = 299.95 W/m2K
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A small metal bead (radius 0.5 mm), initially at 100°C, when place...
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A small metal bead (radius 0.5 mm), initially at 100°C, when placed in a stream of fluid at 20°C, attains a temperature of 28°C in 4.35 seconds. The density and specific heat of the metal are 8500 kg/m3 and 400 J/kgK, respectively. If the bead is considered as lumped system, the convective heat transfer coefficient (in W/m2K) between the metal bead and the fluid stream isa)149.9b)449.7c)283.3d)299.8Correct answer is option 'D'. Can you explain this answer?
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A small metal bead (radius 0.5 mm), initially at 100°C, when placed in a stream of fluid at 20°C, attains a temperature of 28°C in 4.35 seconds. The density and specific heat of the metal are 8500 kg/m3 and 400 J/kgK, respectively. If the bead is considered as lumped system, the convective heat transfer coefficient (in W/m2K) between the metal bead and the fluid stream isa)149.9b)449.7c)283.3d)299.8Correct answer is option 'D'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about A small metal bead (radius 0.5 mm), initially at 100°C, when placed in a stream of fluid at 20°C, attains a temperature of 28°C in 4.35 seconds. The density and specific heat of the metal are 8500 kg/m3 and 400 J/kgK, respectively. If the bead is considered as lumped system, the convective heat transfer coefficient (in W/m2K) between the metal bead and the fluid stream isa)149.9b)449.7c)283.3d)299.8Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A small metal bead (radius 0.5 mm), initially at 100°C, when placed in a stream of fluid at 20°C, attains a temperature of 28°C in 4.35 seconds. The density and specific heat of the metal are 8500 kg/m3 and 400 J/kgK, respectively. If the bead is considered as lumped system, the convective heat transfer coefficient (in W/m2K) between the metal bead and the fluid stream isa)149.9b)449.7c)283.3d)299.8Correct answer is option 'D'. Can you explain this answer?.
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