A long copper rod of diameter 2.0 cm is initially at a uniform temperature of 100°C. It is now exposed to 'an air stream at 13°C with a heat transfer coefficient of 200 W/m2.K. How long would it take for the copper road to cool to an average temperature of 25°C? (Express the answers in seconds.) (Thermal properties of copper: k= 401 W/m-°C, p= 8933 kg/m3, Cp = 0.385 kJ/kg.°C.) 0.17 x S.

A long copper rod of diameter 2.0 cm is initially at a uniform temperature of 100°C. It is now exposed to 'an air stream at 13°C with a heat transfer coefficient of 200 W/m2.K. How long would it take for the copper road to cool to an average temperature of 25°C? (Express the answers in seconds.) (Thermal properties of copper: k= 401 W/m-°C, p= 8933 kg/m3, Cp = 0.385 kJ/kg.°C.) 0.17 x S.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling to 380 K in…

A: The given information in the problem is shown in the following attached image:

Q: Hot square plate (1 m ×1 m) is to be cooled by attaching aluminum circular pin fins (D=0.25 cm, L= 3…

A: Given:- Plate=(1×1)m2D=0.25 cmL=3 cmd=0.6 cmTb=100°CT∞=30°Ch=35 W/m. °C. To find:-Total rate of heat…

Q: A food product with 73% moisture content in a 7 cm diameter can wants to be frozen. The density of…

A: GIVEN:food product with 73% moisture contentdiameter=7 cmdensity of the product is 970 kg/m³thermal…

Q: Air at 24°C is blown over a hot pipe with a surface area of 2.94 m2 to dissipate 924 W of heat…

A: Given data:- Air temperature = 24 °C the pipe surface temperature = 45 °C surface area = 2.94 m2…

Q: A food product with 80% moisture content in a 5 cm diameter can wants to be frozen. The density of…

A: GIVEN:tank diameter, d=5cmdensity, p=1000kg/m3area, A=πdlvolume, V=πd2l4initial temp., T=-1.75'C…

Q: [2] Consider a 1.2-m-high and 2-m-wide double-pane window consisting of two 3-mm-thick layers of…

Q: 10 cm-thick beef steak is being frozen in a -35°C room. The product has 73% moisture content,…

A: As given that ρf= 970 kg/m3 , mm=0.73 , Kf=1.1W/(mk) , Tf=-35°C , Ta= -1.75°C; , h=15 W/(m2K) ; Now…

Q: *3.101 A block of volume 0.025 m³ is allowed to sink in water as shown. A circular rod 5 m long and…

Q: A carbon steel plate (AISI 1010), 10 cm thick, is placed on a rack in a furnace where products of…

A: To solve this problem, we can use the lumped capacitance method since the Biot number (Bi) is less…

Q: A long rod of AISI 4130 steel initially at a uniform temperature of 400°C is suddenly exposed to…

Q: A Thermopane window consists of two 3-mm-thick pane of glass separated by a stagnant air space of…

Q: A food product with 73% moisture content in a 7 cm diameter can wants to be frozen. The density of…

A: Moisture content = 73% = 0.73 Density = 970 kg / m³ Diameter = 7 cm = 0.07 m Thermal conductivity =…

Q: You are designing a small heatsink to cool a high-powered IC on a control unit PCB. The IC puts out…

Question

A long copper rod of diameter 2.0 cm is initially at a uniform
temperature of 100°C. It is now exposed to an air stream at 13°C
with a heat transfer coefficient of 200 W/m2.K. How long would it
take for the copper road to cool to an average temperature of
25°C? (Express the answers in seconds.)
(Thermal properties of copper: k= 401 W/m-°C, p= 8933 kg/m, cp
= 0.385 kJ/kg-°C.)
0.178 s.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A food product with 73% moisture content in a 7 cm diameter can wants to be frozen. The density of the product is 970 kg / m³, the thermal conductivity is 1.2 W / (m K), and the initial freezing temperature is -2 ° C. After 11 hours in the freezing medium -30 ° C, the product temperature becomes -10 ° C. Estimate the convection heat transfer coefficient of the freezing medium. Assume the can as an infinite cylinder. h = W / (m² K).
Number 3 A food product with 80% moisture content in a 7 cm diameter can wants to be frozen. The density of the product is 1000 kg/m³, the thermal conductivity is 1.0 W/(m²K), and the initial freezing temperature is -1.75°C. After 8 hours in the freezing medium -25°C, the product temperature becomes -10°C. Estimate the convection heat transfer coefficient of the freezing medium. Assume the can as an infinite cylinder. h= answer in W/(m²K)
A 200mm diameter spherical steel ball initially at 500°C is rapidly immersed in an oil bath that is at 20°C. The convection coefficient is h = 600W/m²-K, and the steel ball has the following properties: c= 500J/kg-K, p= 7000kg/m³, k=30W/m-K. Determine the time taken (min) for temperature at the surface of the ball to drop to 100°C.
Q3/ A 6(m) long 2(kW) electrical resistance wire is made of 0.2(cm) diameter stainless steel (k = 15.1 W/m °C). The resistance wire operates in an environment at 30°C with a heat transfer coefficient of 140 (W/m?. °C) at the outer surface. Find the temperature distribution equation and determine the surface temperature of the wire.
Thermal jackets are typically put on cryogenicstorage tanks to minimize the heat transfer gainsfrom the surroundings. Consider a cylindercontainer that is 1.5 m long made from steel (k = 750W/m.K) with an inner diameter of 0.5 m and outerdiameter of 0.7 m. If the liquefied natural gas (LNG)inside the cylinder is maintained at 90 K, ambientconditions are Tamb = 20 °C, h = 7 W/m2.K. What isthe required thermal jacket thickness to maintainthe outer temperature of that jacket of 15 °C? (Takea thermal conductivity of the insulation to be kins =0.015 W/m.K). Image credit: Okorder. Image forillustrative purposes only.
Plate glass 5 mm thick at 200°C is to be cooled from both sides using air at 40°C. If surface cracks are to be avoided, determine the maximum value of convective heat transfer coefficient. Material properties are density = 2500 kg/m3, specific heat 670 J/kgK. Thermal conductivity 0.744 W/mk. Also determine the time required in this to cool the plate to 80°C.
Steel cubes 10 mm in width are annealed by heating to 1,377 K and then slowly cooling to 469 K in an air environment for which T∞ = 301 K and h = 24 W/m2-K. Assuming the properties of the steel to be k = 24 W/m · K, ρ = 7,047 kg/m3, and c = 916 J/kg · K, estimate the time required for the cooling process.
The inner and outer surface temperatures of a 1-D slab of material, with a thickness of 4.2 inches, are 180.0°F and 63.0°F respectively. Determine the heat flux through the material in units of BTU/(hr-ft2) if the material is: a) Stainless steel, k = 8.95 BTU/(hr-ft-°F) b) Aluminum, k = 131 BTU/(hr-ft-°F) c) Soil, k = .30 BTU/(hr-ft-°F)