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Graded Discussion Board (GDB) for the course PHY101 (PHYSICS) will start on Wednesday 25th February 2015.

You should remember that you have to post your comments about the discussion title within the time.

This discussion board will be closed on Thursday 26th February 2015.

No comment about the Discussion topic should be posted on the regular Moderated Discussion Board which is created for each lecture.

The topic for the discussion is:

A room has one wall made of concrete, one wall made of copper, and one wall made of steel. All of the walls are the same size and at the same temperature of 20. Which wall feels coldest to the touch?

Select below the best choice according to your understanding and write the reason of your selected choice as well.

  1.        The copper wall
  2.        The steel wall
  3.        The concrete wall
  4.        All three wall equally cold to the touch

 Elaborate your answer by giving a solid reason, give mathematical calculation (proof) where necessary.

Also you should remember that this Discussion is graded and maximum marks for this Graded Discussion Board 5% and it will count in your final Grade. So these marks may be helpful for you to get A grade from B and B grade from C and so on.

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Views: 1947

Replies to This Discussion

Koi tu Discussion Start karo....

Copper

Moazam bhai thora explain kar den plzz

Salam everyone!

Please read and listen to Lecture no. 36 carefully. Specially read for the Heat capacity of some substances. for cooper it is 387 Joule/(kg.K) The answer is there in these lectures i.e lecture# 36,37 and 38. 

All the Best.

Hint

  •  The copper wall
  •  The steel wall
  •  The concrete wall

Concrete is heavier than steel and steel is heavier then copper.

Concrete is heavier than steel and steel is heavier then copper. Heavy things will take more time to change there temperature. Copper is less heavier than other two so that Copper will be more cold.

koi to mathematically prove kary plz ............

Plz koi help karo mathematically kaisy prove honge?

C = Q/delta T

Q= kA (T hot - T cold) / L *t
Q cooper = 387 (A) (37 C - 20 C) / Same size 8* time

wse mene 4 jaga se answer liya hai sb ny copper kaha hai per phr mai confuse hun and abi tak soch rhe hun answer ka

GDB ko mathematecally b prove krna hy?

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