[填空题]
An experiment is conducted on a gas confined in a container.tb. hjua-:aqp r7g ,y6 The pressure P m3;bd dwdsbz+ ;xn.znm2o z4d5 easured in Pascals, and the volume d dx+n; bz3 m.d4;ond5bzs w2zV measured in \mathrm{cm}^{3} satisfy the differential equation
$\frac{\mathrm{d} P}{\mathrm{~d} V}=-\frac{P}{V}$
Initially, the gas has a pressure of 20000 Pascals and it is confined in a container with a volume of 100 $\mathrm{~cm}^{3}$ .
1. Solve the differential equation to show that
P=$\frac{2000000}{V}$
2. Calculate the pressure required to compress the gas to a different container that has a volume of 50 $\mathrm{~cm}^{3}$ .
P= Pa.
