Forces on a Wire Carrying a Currentin a Magnetic Field Magnetic Pressure Magnetic Energy Denisity Magnetic Forces btwn Two ElectricCurrents Magnetic Forces Within an IsolatedCircuit

The Total Current Density J The Curl of B Maxwell’s Equations Maxwell’s Equations in Integral Form

The Waves The Wave Equations Electromagnetic Spectrum Poynting Vector S

Capacitance of An Isolated Conductor Capacitance btwn Two Conductors Potential Energy of a Charge Distribution Energy Density in an Electric Field Forces on Conductors

Electric Polarization P Bound Charges Gauss’ Law, Electric Displacemant D

Magnetic Induction The Divergence of B Magnetic Monopoles The Vector Potential A A and V Integral of A over a Closed Curve

Electromagnetism Where the experiment and theory meet

破碎岩石：路基开挖、隧道掘 进以爆破法为主。 钻孔作业：为随后爆破工作提 供安放炸药的空间。 钻孔机械：浅孔用凿岩机钻孔。 深孔则用牙轮或潜孔钻机

各类爆炸现象 爆炸：物质急剧改变形态， 在瞬间放出大量的能量，对 周围介质作机械功的过程， 并伴随声、光、热效应的现象

组成： 氧化剂 (硝酸铵、 硝酸钾等) 、可燃剂(木粉、沥 青、石蜡、煤油、柴油等)及 敏化剂(TNT、石英砂、碎玻 璃、金属粉等)