Question

若外界大气压为 HcmHg 试写出下列各种情况下,被密封气体的压强 急

Answer 1

P1=P0=HcmHg

P2=P0+hcmHg=HcmHg+ hcmHg=(H+h) cmHg

P3+ hcmHg=P0P3=P0-hcmHg=HcmHg-hcmHg=(H-h) cmHg

P4+ hcmHg=P0P4=P0-hcmHg=HcmHg-hcmHg=(H-h) cmHg

如图

P5=PA= P0+hcmHg=HcmHg+ hcmHg=(H+h) cmHg

P0=PB=hcmHg+P6P6= P0-hcmHg=HcmHg-hcmHg=(H-h) cmHg

P7+ hcmHg=P0P7=P0-hcmHg=HcmHg-hcmHg=(H-h) cmHg