العنوانLeA hot small copper ball [c in kJ/kg.°C, k in W/m.°C] is suddenly placed in watermaintained at 100 °C. The convection heat transfer coefficient is h in W/m². °C. Deriveequation to calculate the time required to reduce ball to temperature T.ATranscribed Image Text: A hot small copper ball [c in kJ/kg.°C, k in W/m.°C] is suddenly placed in water maintained at100 °C. The convection heat transfer coefficient is h in W/m².°C. Derive equation to calculate the time required to reduceball to temperature T.

The problem involves a hot copper ball being placed in water at a constant temperature. The ball…

Answered: العنوان Le A hot small copper ball [c…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Conduction Heat Transfer X material (a) material (b) . both (a) and (b) have the same thermal conductivity the temperature distribution is independent of thermal conductivity it's not that simple 9. Fin efficiency is defined as: • tanh (mL) (hP/k Ac)1/2 (heat transfer with fin) / (heat transfer without fin) (actual heat transfer through fin) / (heat transfer assuming all fin is at T = Tb) (Tx=L-Tf)/(Tb-Tf) 10. For an infinite fin, the temperature distribution is given by: (T-Tf)/(Tb-Tf)= e-mx. The heat flow through the fin is therefore given by: k (Tb-Tf)/L ● zero, because the fin is infinite ● infinite because the fin is infinite ● (Tb-Tf) (hP/k Ac)1/2 ● (Tb – Tf) (h P / k Ac)1/2 tanh (mL) 11. The Biot number, Bi, is defined as: • Bi=hk/L • Bi=hL/k • Bi= k/LH • Bi=qL/k • Bi=p UL/k 12. For a plate of length L, thickness, t, and width, W, subjected to convection on the two faces of area L x W. What is the correct length scale for use in the Biot number? . L ● W ● t • t/2 • L/2 13. If Bi…
EGMN 301 - Fluid Mechanics
Give True or False for the following: 1.In liquids and gases, heat transmission is caused by conduction and convection 2.The surface geometry is the important factor in convection heat transfer 3. The heat transfer by conduction from heated surface to the adjacent layer of fluid, 4. The heat transfer is increased in the fin when &> 1 5.The unit of the thermal diffusivity is m²/s 6. Temperature change between the materials interfaces is attributed to the thermal contact resistance 7. A material that has a low heat capacity will have a large thermal diffusivity. 8. Heat conduction flowing from one side to other depends directly on thickness 9.Fin efficiency is the ratio of the fin heat dissipation with that of no fin 10.The critical radius is represented the ratio of the convicted heat transfer to the thermal conductivity
Thermodynamics. Help me to answer this question By referring to the thermodynamics tables, calculate the missing properties in the following table and determine the phase for each subtance.
Please help with homework as soon as you can.
In a building located at sea level, air flowing at 6000 lbm/hr is cooled from 80°F drybulb and 75°F wet-bulb to full saturation at the outlet of a cooling coil operating with an apparatus dew point temperature of 55°F. Please determine the following and mark process on a psychrometric chart at sea level a) The amount of water removed in [lbm/hr] b) The amount of latent heat removed in [BTU/hr] c) The amount of sensible heat removed in [BTU/hr] d) The Sensible Heat Factor of the cooling coil e) The cooling coil capacity in [BTU/hr]
Suppose you're converting a bill of materials for machining feedstock from the British gravitational (U.S. system) of units to International System (SI) units. Your goal is to have all of the material quantities in kilograms. Your bill of materials lists values for required weights of brass rod in pounds. To convert to these values to kilograms you first you divide by gravitational acceleration in feet per second squared to get a mass in slugs, then convert slugs to kilograms using standard conversion factors. Group of answer choices True False

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