Question

More doubts:

Answer 1

@Vincent-Lyon.Fr

Answer 2

The gas neither receives nor does work on the outside.
Since the walls are insulated, no heat is exchanged either.

Then from 1st law of thermodynamics, internal energy is constant.

For an ideal gas, no change in internal energy means no change in temperature.

Since volume is doubled at constant temperature, then pressure will be halved.

Answer 3

So it is just an application of ideal gas law. I see, thanks!

Answer 4

This is an example of Joule - Gay-Lussac expansion for an ideal gas.
http://en.wikipedia.org/wiki/Joule_expansion

Answer 5

In a sensitive meterbridge apparatus the bridge wire should possess
a) high resistivity and high temperature coefficient
b)high resistivity and low temperature coeff.
c) low resistivity and high temp.coeff.
d) low resistivity and low temp.coeff.

Answer 6

I am confused.