Homework Help: physics

Posted by joy on Thursday, September 23, 2010 at 7:41pm.

A brass lid screws tightly onto a glass jar at 20 oC. To help open the jar, it can be placed into a bath of hot water. After this treatment, the temperature of the lid and the jar are both 60 oC. The inside diameter of the lid is 8.0 cm at 20 oC. Find the size of the gap (difference in radius) that develops by this procedure.

so radius - 4.0cm

is this the right equation for it?

delta L = alpha (initial Length) (delta Temp)

physics - bobpursley, Thursday, September 23, 2010 at 7:44pm
No. You need to work with area expansion, find the new diameter from area, then the change in area.
physics - joy, Thursday, September 23, 2010 at 7:46pm
:O our teacher never mentioned area expansion..

Answer this Question

Related Questions

Physics - A brass lid screws tightly onto a glass jar at 20 oC. To help open the...
Physics - A brass lid screws tightly onto a glass jar at 20 oC. To help open the...
PHYSICSSS! - A brass lid screws tightly onto a glass jar at 20 oC. To help open...
physics - If you heat a thin, circular ring in the oven, does the ring’s ...
math - The ratio of the number of mints in Jar A to that in Jar B was 8 : 5. ...
science - Hey. I need two examples of screws (like the one from the six simple ...
biology - Bromothymol blue (BTB) is a chemical that turns yellow in the presence...
algebra - Pippa filled 1/8 of a jar with blue stones, 1/4 of a jar with yellow ...
math - pennies are kept in a jar the mass of the jar is 20 g the mass of each ...
math - Selma reached into a coin jar, randomly pulled out 100 coins, and found ...

For Further Reading

First Name:
School Subject:
Answer: