n a certain instance, a blossom get a touvhed of frost on the strawberry, the harvest was significantly reduced. consider a very clear night with a slight breeze of about 10 km/hr making the convection coefficient equal to 21 W/m-k. the outer space temperature maybe assumed to be 110K and the emissivity of the strawberry is 0.70. at what surrounding temperature will the strawberries freeze?

Q: After sunset, radiant energy can be sensed by a person standing near a brick wall. Such walls…

A: The radiant thermal flux per square metre from a brick wall at this temperature: 526.75 W/m2

Q: heat and mass transfer An uninsulated steam pipe of 100-mm diameter is routed through a building…

A:

Q: A solid sphere of radius R = 8.0 cm uniformly generates 5 × 10° W/m³ of heat within it. Surrounding…

A:

Q: 10-cm-diameter, 30-cm-high cylindrical bottle contains cold water at 38°C. The bottle is placed in…

A: External forced convection: The convection heat transfer occurs due to the bulk motion of the…

Q: heat and mass transfer An uninsulated steam pipe of 100-mm diameter is routed through a building…

A: GIven:L=1 md=100 mmTa=27°C =300 KTs=147°C =420 Kh=10W/m2Kε=0.8Surafce area,A=πdLA=π0.11 =0.314…

Q: he temperature of the inside surface of a wall of 3-m height and 5-m width is 32 etermine the heat…

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Q: heat and mass transfer An uninsulated steam pipe of 100-mm diameter is routed through a building…

A:

Q: heat and mass transfer An uninsulated steam pipe of 100-mm diameter is routed through a building…

A:

Q: Which of the following statement is wnong? O a. In the boundary layer region the frictional effect…

A:

Q: You have to do thermal analysis of a building near an arctic observatory, which has a footprint of…

A: To find: 1. Total heat transfer 2. Dominate mode of heat transfer  3. Ratio between the heat…

Q: A circular plate of diameter (2.20 m) is placed some how 1.5 meter above the room floor, if the…

A: Given data     Circular plate dia = 2.20m                K = .0372 w/mk                        Ra =…

Q: heat and mass transfer An uninsulated steam pipe of 100-mm diameter is routed through a building…

A: GIven:L=1 md=100 mmTa=27°C =300 KTs=147°C =420 Kh=10W/m2Kε=0.8Surafce area,A=πdLA=π0.11 =0.314…

Q: Consider a 1 m high rectangular closed space with two surfaces separated by an air gap of 0.125 m…

A:

Q: and Surface temperature 4. In what functions does Nusselt number in natural convection differ from…

A:

Q: A steam pipe of a 45 m long and a 6.5-cm- diameter with a surface temperature of 170 °C and a…

A:

Q: The free convection heat transfer coefficient on a thin hot vertical plate suspended in still air…

A: Given   Temperature, Tplate = 277 °C                           Tinf = 28°C                   Mass, m…

Q: from a vertica is found to be °C, all other p Nusselt numb

A: solution of given problem is below:

Q: Consider a shed with an 8-ftx12-ft base and 4-ft height. The temperature of the outer surface of the…

A: Write the expression of rate of heat loss from the building.…

Q: rate of heat loss from a heated horizontal pipe as a result of natural (free) convection that ha ace…

A:

Q: the outer surface temperature of the furnace should be kept below 45°C. Based on the above…

A:

Q: Determine the total heat transfer rate to the ice water.

A: Given:   To determine:the total heat transfer rate to the ice water

Q: 3. Consider a hot automotive engine, which can be approximated as a 0.6 m high, 0.3 m wide, and 0.9…

A:

Q: A circular plate of diameter (2.07 m) is placed some how 1.5 meter above the room floor, if the…

A: Given data as: Diameter of the plate (D)=2.07 m Height of the plate from ground (H)=1.5 m Raleigh…

Q: The rear window of an automobile is defogged by passing warm air over its inner surface. If the warm…

A:

Q: Consider a thin suspended hotplate that measures 0.25 mx 0.25 m. The isothermal plate has a mass of…

A:

Q: 3. A 5m long x Im wide horizontal plate is heated on top and insulated on the bottom. The plate is…

A:

Q: A plate heated with a heat flux of 5 kW/m^2 and has an emissivity of 0.3. the air is over the plate…

A:

Q: Define the cooling of a boiled egg by forced and natural convection.

A: Rate of heat transfer by convection is given by Where h is convective heat transfer coefficient.…

Q: A 25-cm circular grill has an emissivity of 0.9. The temperature of the air and surrounding surfaces…

A: To determine the heat transfer from the grill, first of all we need to determine the Reynold number…

Q: The rear window of an automobile is defogged by passing warm air over its inner surface. If the warm…

A:

Q: nvection. (a) is thinner than the hydrod

A: given: For the fluid flowing over a flat plate with Prandtl number greater than unity, the thermal…

Q: You are designing an industrial furnace to keep sheet metal at a fixed temperature. You decide a…

A: It is asked to find the heat input per unit length

Q: There is a 50 cm high vertical pure aluminum plate with a uniform surface temperature of 220 °C…

A: Given: L=0.5m Ts=220oC T∞=20oC   To find: h

Q: Differentiate between free and forced convection with examples.

A:

Q: A circular grill of diameter 0.15 m and emissivity 0.7 is maintained at a constant surface…

A: Given: Diameter of the cricular grill D=0.15m Emissivity=0.7 Surface temperature Ts=137°C or 410K…

Q: A circular plate of diameter (2.20 m) is placed some how 1.5 meter above the room floor, if the…

A: Given Data:- Diameter (d) = 2.20 m Raleigh number (Ra) = 7.653 × 107 × d3 Temperature (∆T) = 73°C…

Q: An uninsulated steam pipe of 100-mm diameter is routed through a building whose walls and air are at…

A: GIven:L=1 md=100 mmTa=27°C =300 KTs=147°C =420 Kh=10W/m2Kε=0.8Surafce area,A=πdLA=π*0.1*1 =0.314…

Q: Calculate the cooling load (W) for glass window that faces South-East direction at 32° latitude at…

A:

Q: A geodesic dome constructed with an aluminum frameworkis a nearly perfect hemisphere; its diameter…

A: Given Data Diameter, d=55 m Temperature, t1= -15oC, t2=35oC. Here, the volume of geodesic dome is,…

Q: The rear window of an automobile is defogged by passing warm air over its inner surface. If the warm…

A:

Q: Define convection and its types. Either free or forced convection is good by considering an example

A: The convection is a mode of heat transfer which occurs by the mass motion of a fluid such as air.…

Q: An engineer proposes to decrease the gap between the windows of double pane window to decrease heat…

A: The air present inside the glass offers resistance to the radiation and conduction heat transfer.

Q: A horizontal, high-pressure steam pipe of 0.1 m outside diameter passes through a large room whose…

A:

Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.