Question

An aluminum cylinder with radius 1.7cm and length 18cm is heated to 430?C. Find the net...

An aluminum cylinder with radius 1.7cm and length 18cm is heated to 430?C. Find the net power this cylinder radiates into a room at 23?C.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Radius r = 1.7 cm = 0.017 m

Area of cross section =

                                  = 9.079 x 10 -4 m 2

Total surface area A = 2 + 2

                             = 18.158 x 10 -4 + 0.019226

                             = 0.021 m 2

Length L = 18 cm = 0.18 m

If the emissivity of aluminium e = 1

Then the net power radiates P =

Where T = 430 o C = 430 + 273 = 703 K

         T ' = 23 o C = 23 + 273 = 296 K

         = Stefan constant = 5.670 x 10-8 W m-2 K-4

Substitute values you get   P = 282.24 watt

0 0
Know the answer?
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
Similar Questions
A 5-m-long cylinder of solid aluminum has a radius of 2 cm. (a) If the cylinder...
A 5-m-long cylinder of solid aluminum has a radius of 2 cm. (a) If the cylinder is at a temperature of 5 °C, how much will the length change when the temperature rises to 30 °C? (b) Due to the temperature increase, by how much would the density of the aluminum cylinder change? The density decreases by % upon heating. c) By what percentage does the volume of the cylinder increase? The volume increases by % upon heating.
A 3.00-m-long cylinder of solid aluminum has a radius of 2.00 cm. 1) If the cylinder...
A 3.00-m-long cylinder of solid aluminum has a radius of 2.00 cm. 1) If the cylinder is initially at a temperature of 3.00∘∘C, how much will the length change when the temperature rises to 30.0°C? (Express your answer to three significant figures.) 2) Due to the temperature increase, by how much (in %) would the density of the aluminum cylinder decrease? (Express your answer to three significant figures.) 3) By what percentage does the volume of the cylinder increase? (Express...
A solid cylinder is radiating power. It has a length that is ten times its radius....
A solid cylinder is radiating power. It has a length that is ten times its radius. It is cut into a number of smaller cylinders, each of which has the same radius. Each small cylinder has the same temperature as the original cylinder. The total radiant power emitted by the pieces is twice that emitted by the original cylinder. How many smaller cylinders are there? Give your answer as a number with no units.
With a radius of 1cm, A iron sphere is heated to 999 degrees C.   If we...
With a radius of 1cm, A iron sphere is heated to 999 degrees C.   If we Assume iron has an emissivity of 0.68, what is the power radiated by the iron sphere if it is placed in a room temperature environment? How many 100 Watt light bulbs would you need to generate the same amount of power?
A 4.5 kg block of aluminum is heated from 29?C to 97?C at atmospheric pressure. Find...
A 4.5 kg block of aluminum is heated from 29?C to 97?C at atmospheric pressure. Find the work done by the aluminum. Assume the density of aluminum is 2700 kg/m3 and the thermal coefficient of expansion is 2.4 × 10?5 ( ?C)?1 . Answer in units of J Find the amount of energy transferred to it by heat. Assume the specific heat of aluminum is 900 J/kg · ? C. Answer in units of J. Find the increase in its...
A quantity of gas in a piston cylinder is at room temperature (20°C) and is heated...
A quantity of gas in a piston cylinder is at room temperature (20°C) and is heated in an isobaric(constant pressure)process. What will be the temperature of the gas in degrees Celsius when it has expanded to a volume of 0.600m3?
The density of a cylinder of radius R and length l varies linearly from the central...
The density of a cylinder of radius R and length l varies linearly from the central axis where ρ1=500 kg/m3 to the value ρ2=3ρ1. If R=.05 m and l= .1 m, find: a. The average density of the cylinder over the radius. b. The average density over its volume. c. the moment of inertia of the cylinder about its central axis.
a solid copper cylinder has radius 1cm and length of 90cm . the field at the...
a solid copper cylinder has radius 1cm and length of 90cm . the field at the surface of the cylinder is 19N/C outward . what is the charge ( inPc= e-12) on the cylinder?
A solid cylinder of radius r1 = 2.8 cm, length h1 = 5.1 cm, emissivity 0.93,...
A solid cylinder of radius r1 = 2.8 cm, length h1 = 5.1 cm, emissivity 0.93, and temperature 32°C is suspended in an environment of temperature 52°C. (a) What is the cylinder's net thermal radiation transfer rate P1? (b) If the cylinder is stretched until its radius is r2 = 0.45 cm, its net thermal radiation transfer rate becomes P2. What is the ratio P2/P1?
A solid cylinder of radius r1 = 2.3 cm, length h1 = 5.3 cm, emissivity 0.84,...
A solid cylinder of radius r1 = 2.3 cm, length h1 = 5.3 cm, emissivity 0.84, and temperature 36°C is suspended in an environment of temperature 64°C. (a) What is the cylinder's net thermal radiation transfer rate P1? (b) If the cylinder is stretched until its radius is r2 = 0.44 cm, its net thermal radiation transfer rate becomes P2. What is the ratio P2/P1?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT