Homework Help: Physics

Posted by Phil on Tuesday, November 16, 2010 at 10:54pm.

A brass plug is to be placed in a ring made of iron. At 20 degrees Celsius, the diameter of the plug is 8.737 cm and that of the inside of the ring is 8.723 cm.

They must both be brought to what common temperature in order to fit? (ANSWER: -210 degrees Celsius)

What if the plug were iron and the ring brass?
(I got -208 degrees Celsius, but that's incorrect)

Physics - Phil, Tuesday, November 16, 2010 at 11:07pm
(brass diameter)*(1+(brass coefficient)*(change in brass temperature))

=

(iron diameter)*(1+(iron coefficient)*(change in iron temperature))

where:
brass coefficient = 19*10^-6 K^-1
iron coefficient = 12*10^-6 K^-1
Physics - Phil, Tuesday, November 16, 2010 at 11:32pm
Nevermind. The answer is 250 degrees Celsius. Duh!

Answer this Question

Related Questions

physics - At 20 degrees C an aluminum ring has an inner diameter of 5.000 cm, ...
PHYSICS 102E - a brass ring of diameter 10.00cm at 20.0 degrees Celsius is ...
Physics - an iron of diameter 4 cm at 25 degree and a cylinder of diameter 4.002...
Physics - 1). A hot iron horseshoe (mass=.40kg), just forged, is dropped into 1....
Physics - A Jeweler working with a heated 47g gold ring must lower the ring'...
chemistry - A 100.0 gram sample of iron at 80.0 degrees Celsius was placed in ...
Physics - Please Help! An object at 20 degrees Celsius with heat capacity 100 ...
Physics - Please Help! An object at 20 degrees Celsius with heat capacity 100 ...
Physics - Please Help! An object at 20 degrees Celsius with heat capacity 100 ...
Physics - Please Help! An object at 20 degrees Celsius with heat capacity 100 ...

For Further Reading

First Name:
School Subject:
Answer: