When a certain gas under a pressure of 4.90 106 pa at 20.0°c is allowed to expand to 3.00 times its original volume, its final pressure is 1.06 106 pa. what is its final temperature?

As per question the initial states of the gases are given as

INITIAL STATE:                                          FINAL STATE:

AS  per combined gas equation obtained from the combination of Boyle's law and Charles law [Basic ideal gas laws]

Hence

                    =

                    =190.3 K [ANS]

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .