Assuming temperature is constant, what is the new volume when a 100.0 cm3 container at 120.0 kPa is expanded until the pressure is 60.0 kPa?

200cm³

Explanation:

Given parameters;

Initial volume  = 100cm³

Initial pressure = 120kPa

Final pressure  = 60kPa

Unknown:

Final volume  = ?

Solution:

The temperature is constant, we apply Boyle's law to solve this problem.

Boyle's states that "the volume of fixed mass of a gas varies inversely as the pressure changes, if the temperature is constant".

  Mathematically;

              P₁V₁  = P₂V₂

P and V are the pressure and volume

1 and 2 are the initial and final values;

 Now insert the parameters and solve;

             120 x 100  = 60 x V₂

                     V₂ = 200cm³

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j