- #1

- 40

- 0

how can i solve this? i have no idea.. help !

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter jsalapide
- Start date

In summary, the length of an aluminum rod and a copper rod at 5 degrees Celsius is 100 cm. To find the temperature at which one rod will be 0.5 mm longer than the other, we must use the coefficients of expansion (2.38x10^-5 for aluminum and 1.68x10^-5 for copper) and the equation ∆L=(α∆T)(100cm). After solving, the temperature is 71.43 degrees Celsius. Similarly, on a hot day where the temperature is 32 degrees Celsius, the distance between two lamp posts on the road is 30.018 m, taking into account the coefficient of linear expansion of the metal tape (50

- #1

- 40

- 0

how can i solve this? i have no idea.. help !

Physics news on Phys.org

- #2

Homework Helper

Gold Member

- 2,129

- 41

- #3

- 40

- 0

the coefficient of expansion of aluminum is 2.38x10^-5

the coefficient of expansion of copper is 1.68x10^-5

the equation I used was ∆L=(α∆T)(100cm)

i followed your instructions and..

my answer is 71.43 degrees..

is it right?

- #4

Homework Helper

Gold Member

- 2,129

- 41

- #5

- 40

- 0

tnx for the help sir..

- #6

- 40

- 0

1.On a hot day where the temperature is 32 degrees celsius, the distance between two lamp posts on the road is 30m as measured by a metal tape whose coefficient of linear expansion is hypothetically 50 x 10^-6 /degree Celsius. If the tape gives its correct reading at 20 degrees, what is the actual distance between the lamp posts?

my answer is 30.018 m..

is that correct?

- #7

Homework Helper

Gold Member

- 2,129

- 41

Yes, I get the same answer.

- #8

- 40

- 0

thanks a lot sir..

Share:

- Replies
- 5

- Views
- 743

- Replies
- 3

- Views
- 673

- Replies
- 28

- Views
- 790

- Replies
- 1

- Views
- 800

- Replies
- 3

- Views
- 1K

- Replies
- 8

- Views
- 367

- Replies
- 22

- Views
- 1K

- Replies
- 10

- Views
- 704

- Replies
- 1

- Views
- 578

- Replies
- 10

- Views
- 751