检举1.P阀=F/S=G/S=mg/S=0.1kg*10N/kg/0.00001m²=100000Pa
P内=P0+P阀=100000+100000=200000Pa
2.因为200000Pa＞180000Pa
所以不能用
P阀=P大-P0=180000-100000=80000Pa
G=F=PS=80000Pa*0.00001m²=0.8N
m=G/g=0.8N/10N/kg=0.08kg=80g