Oil at 60°C flows at a velocity of 20 cm/s over a5.0-m-long and 1.0-m-wide flat plate maintained at a constanttemperature of 20°C. Determine the rate of heat transferfrom the oil to the plate if the average oil properties arer = 880 kg/m3, m = 0.005 kg/m?s, k = 0.15 W/m?K, andcp = 2.0 kJ/kg?K.

Q: A 78.6 kg sprinter accelerates from rest to a speed of 17.7 m/s in 5.1  s. (e) If no heat is…

A: Given data The mass of the sprinter is m = 78.6 kg. The final velocity of the sprinter is v = 17.7…

Q: A fire walker runs across a bed of hot coals without sustaining burns. In this problem, you may…

A: Temperature of the man , Tc = 37 °C Thickness of callus , dc = 2.9 mm = 2.9 x 10-3 m kc = kw = 0.08…

Q: An aluminum kettle sitting on an electric hot ring contains 2.00 kg of boiling water at 100 degrees…

A: Latent heat of evaporation of water=2260×103J/kgHeat required (Q) to evaporate 2kg of boiling water…

Q: How many grams of coffee must evaporate from 350 g of coffee in a 100-g glass cup to cool the coffee…

A: Net heat transferred from the system is zero

Q: In a production facility, 1.2-in-thick, 2-ft *2-ft square brass plates (r = 532.5 lbm/ft3 and cp…

A:

Q: An ice chest is constructed of Styrofoam (k = 0.033 W/moC) with inside dimensions of 25 by 40 by 100…

A:

Q: Heat transfers from your lungs and breathing passages by evaporating water. (a) Calculate the…

A:

Q: A metal sphere with radius 3.20 cm is suspended in alarge metal box with interior walls that are…

A: (a) The Stefan’s law can be employed to find out the emissivity of the metal sphere. The rate at…

Q: A square hole 4.3 cm along each side is cut in a sheet of copper. Find the change in the area of…

A:

Q: mass of ice in the mixture at thermal equilibrium?

A: Given that There are 2kg of water at 10°C and 6kg of ice at -10°C When we mixture the two both We…

Q: In the lab, you have nails with mass Mn and temperature Tn. You submerge those nails in the water…

A: Given data The Specific heat capacities of nails is,Cn=0.12 cal/gC The Specific heat capacities of…

Q: A circular lake 1.0 km in diameter is 18 m deep. Solar energy is incident on the lake at an average…

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Q: An aluminum cylinder 10 cm long, with a cross-sectional area of20 cm2, is used as a spacer between…

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Q: A 0.136m-thick sheet of ice covers a lake. The air temperature at the ice surface is -15.4\deg C. In…

A:

Q: You want to prevent a bowling ball with a diameter of 22.00 cm from being able to pass through a…

A: l2-l1=αl1Tf-Ti

Q: The inner and outer surfaces of a 4-m * 7-m brickwall of thickness 30 cm and thermal conductivity…

A:

Q: The convection heat transfer coefficient for a clothedperson standing in moving air is expressed as…

A:

Q: A) Determine (a)the rate of heat transfer to the iced water in the tank IN W B) Determine the amount…

A: The rate of heat transfer depends upon the difference in temperature between the substances. This is…

Q: brass ring of diameter 10.00 cm at 17.6°C is heated and slipped over an aluminum rod of diameter…

A: Part A-   Now, on putting the values And Yes, This temperature is attainable.

Q: bubble having a diameter of 92 cm is released from a depth of 4.5 m from the bottom of a swimming…

A:

Q: A liquid food (density = 1,010 kg/m3, k =.5W/m°C, Cp = 3,000J/kg°C) is being heatedfrom an initial…

A: (a) The Biot number is a dimensionless quantity, which is used in the calculations of the heat…

Q: a) You have a styrofoam container with 815 g of a soft drink (specific heat of 4,100 J/(kg °C)) at…

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Q: Following vigorous exercise, the internal body temperature of a 69.5-kg person is 40.0°C.  At what…

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Q: A 50-m-long section of a steam pipe whose outer diameteris 10 cm passes through an open space at…

A:

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.