HomeworkLib
Question

a long iron rod is heated to 700 degrees celcius. the rod is then placed in...

a long iron rod is heated to 700 degrees celcius. the rod is then placed in a water bath that is at a constant temperature of 50 degrees celcius with h= 128 W/m^2 * K. How long will it take the iron rod surface to cool to 200 degrees celcius? use the one term approximation method. for iron: p = 7870 kg/m^3, Cp=447 J/kg *K, k = 80.2 W/m * K. No diameter given

engineering   Mechanical-Engineering   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
a long iron rod is heated to 700 degrees celcius. the rod is then placed in...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • an iron cylinder with a mass of 25.0g at 105 degrees celcius is placed in a...

    an iron cylinder with a mass of 25.0g at 105 degrees celcius is placed in a beaker containing 25.0 ml of water at 25 degrees celcius. Assuming that no heat is lost to the surroundings, what will the final temperature of the water bne? the specific heat capacity of iron = .449 j/g degrees celcius and water = 4.18

  • (10 Points) To find the heat conduction coefficient of Iron: an Iron rod with diameter of...

    (10 Points) To find the heat conduction coefficient of Iron: an Iron rod with diameter of 4 cm and length of 50 cm used for the following tests. 1: The rod heated to 650 oC (Uniform Temperature) at first and immersed in water bath at 50 oC and heat transfer coefficient of h=16.3 kW/m2oC. The surface temperature of the rod measured to be 250 oC after 3.45 seconds. 2: Then we removed the rod and immersed into a new water...

  • c A long cylindrical rod of diameter D1-0.01 m is coated with this new material and...

    c A long cylindrical rod of diameter D1-0.01 m is coated with this new material and is placed in an evacuated long cylindrical enclosure of diameter D2-0.1 m and emissivity e2-0.95, which is cooled extenally and maintained at a temperature of 200 K at all times. The rod is heated by passing electric current through it. When steady operating conditions are reached, it is observed that the rod is dissipating electric power at a rate of 8 W per unit...

  • A rod made of iron with a mass of 0.90 kg is heated to 800°C, then...

    A rod made of iron with a mass of 0.90 kg is heated to 800°C, then dropped into 7.00 kg of water at 10°C. What is the total change in entropy (in J/K) of the rod-water system, assuming no energy is lost by heat from this system to the surroundings? The specific heat of iron is 448 J/(kg · K), and the specific heat of water is 4,186 J/(kg · K). (Hint: note that dQ = mcdT.)

  • a) If an iron rod 1.5 m long at 20 degree C and expands by 1.416...

    a) If an iron rod 1.5 m long at 20 degree C and expands by 1.416 mm when heated to 100 degree C. Find the coefficient of linear expansion for iron. b) A large wooden barrel needs an iron band to be placed around the rim of its base. The iron band is made slightly smaller than the diameter of the barrel's base so that it may be heated placed over the barrel and shrunk tightly into place. If the...

  • This is for static air don't just copy from others', this is a different problem. 1. A very long horizontal cylinder of Unobtainium, of diameter 100 mm, is initially at a uniform temperature...

    This is for static air don't just copy from others', this is a different problem. 1. A very long horizontal cylinder of Unobtainium, of diameter 100 mm, is initially at a uniform temperature of 500 K. The cylinder is left to cool in a large room of static air at 300 K. Calculate a) the average convective heat transfer coefficient at the beginning of the cooling process when the initial temperature of the cylinder is 500 K, and 10] 15]...

  • A long, cylindrical electrically heated rod, 2cm in diameter, and is installed in a vacuum furnace...

    A long, cylindrical electrically heated rod, 2cm in diameter, and is installed in a vacuum furnace The surface of the heating rod has an emissivity of 0.9 and is maintained at 1000 K, while the interior walls of furnace are black and are 800 K. Calculate the net rate at which heat is lost from the rod per unit length. lgnore the flux from the endpoints.

  • Water is to be heated from 10 °C to 83 °C as it flows through a...

    Water is to be heated from 10 °C to 83 °C as it flows through a 0.015 m-internal-diameter, 13-m-long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady operation all the heat generated in the heater is transferred to the water in the tube. The system provides hot water at a rate of 5 L/min Assumelp...

  • An 810-g iron block is heated to 400 ∘C and placed in an insulated container (of...

    An 810-g iron block is heated to 400 ∘C and placed in an insulated container (of negligible heat capacity) containing 38.0 g of water at 25.0 ∘C. What is the equilibrium temperature of this system? The average specific heat of iron over this temperature range is 560 J/(kg⋅K).

  • An 900-g iron block is heated to 380 ∘C and placed in an insulated container (of...

    An 900-g iron block is heated to 380 ∘C and placed in an insulated container (of negligible heat capacity) containing 36.0 g of water at 20.0 ∘C. What is the equilibrium temperature of this system? The average specific heat of iron over this temperature range is 560 J/(kg⋅K).

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT