What is the density of water vapor in g/m3 on a hot dry day in the desert when the

Week 2 Monday, August 29, 2016 12:03 AM • Charging by rubbing- if you rub glass rod with silk, e- transfer from rod to silk leaves equal + charge on rod..only rubbed area is charged • Polarization: ○ In neutral atoms:center of + charge coincides w/ center of - charge ○ Charged atoms:centers separate from electric force  Causes electric dipole(polarization) ○ Ex) neutral wall w + balloon…+ charged balloon will induce - charge on insulator(wall) • Coulomb's law- electric force has following properties: ○ Directed along line joining 2 charged particles ○ Inversely proportional to square of separation distance (r) btwn them Proportionalto product of mags of charges q1 and q2 on the particles Attractive- when charges are opp signs Repulsive- charges have same signs (Same as above w/out - charge) Coulomb's constant: -k =8.9875x10^9 N m /C • Electrostaticforces- electric forces btwn 2 unmoving charges • Magnetic forces- moving charges • Field force- force exerted by one object on another object even tho there is no physical contact btwn them ○ Directs along line connecting 2 bodies ○ Other ex of field force) gravity ○ Electrical v gravitational force Stronger weaker Attractive or repulsive always attractive Both: directed a