JAMB - Physics (2001 - No. 16)
A gas with initial volume of 2 X 10\(^{-6}m^3\) is allowed to expand to six times its initial value at constant pressure of 2 x 10\(^5Nm^{-2}\). The work done is?
2.0J
4. 0 J
12.0 J
2.4 J
คำอธิบาย
W = PΔV = 2 x 10\(^5\) * (12 x 10\(^{-6}\) - 2 x 10\(^{-6}\))
= 2 x 10\(^5\) 10 x 10\(^{-6}\)
= 2.0J
= 2 x 10\(^5\) 10 x 10\(^{-6}\)
= 2.0J