北师大版八年级物理全册知识点

12,,,==031OFf231FFFF2F,2f,,:u2ffv2ffu2fv2fuf|v|uufu2f1:2:,.1:2:12345N1N6AB=CD,,,,78,,,,,12AB,,,.C:34AB1234051:2:3:,G=mgg=9.8N/kg1kg9.8N1230456712F=G4521p=F/SpPaFNSm2AFF=G=mgSBp=ghPa.Pa.104Pa.104N2F=G+Gp=F/S1234V=Shm=V=ShF=G=mg=Shg.p=F/S=ghp=ghABpPagN/kghmCD5F=GFGFG6p=ghF=pSFp=F/SF=G71p0234ph(1)1m760mm(2)=(3)p0=760mmHg=76cmHg=1.01105Pa()(4)AB10.3mCDHcmHgHcmHg(H+h)cmHg(H-h)cmHg(H-h)cmHg(H+h)cmHg(H-h)cmHg(H-h)cmHgE76cm1=760mmHg=76cmHg=1.01105Pa2=2.02105Pa20.6m5(1)(2)3000,10,100Pa6789101hhhhhhh234(1)(2)FGF=GFGF=G=(3)1/3(2/3)F=GVg=Vg=VV=23F=G=V=VVVFGG,F=G/(G-F)5(1)(2)F=G=Vg(3)6GFGFGFGFFG7(1)tmV=G=mgF=mgG=mg(2)(3)(4)8(1)(2)()(3):F=GF()F=FFF=G()F=GF=Vg12OF1F2l1mOF1l1l2F2l2O3F1l1=F2l2F1/F2=l2/l141(F=GSF(vF)=SG(vG)22l1l2F2F1F1l1F2l2F=12GF=12(G+G)SF(vF)=2SG(vG)3F=1nGF=1n(G+G)SF(vF)=nSG(vG)n=(G+G)/F123W=FS41J=1Nm1m0.5J5FS=12FS=Gh3FL=GhFLGhfFL=fL+GhFGhWGh=WW=WW=Gh2W=WW=GhW=fL3W=WW=FS=WW=fL+Gh=FL4160%60%5GhFSABC123=Fv4WkWmW1kW=103W1mW=106W1=735W66kWs66000J5WW=GhFL=GhFS=GhFh=GF=GhFS=GhF2h=G2F=GhFS=GhFnh=GnF=WW=GhFS=PWt=