An ink-jet printer steers charged ink drops vertically. Each drop of ink has a mass of 10-11 kg, and a charge due to 500,000 extra electrons. It goes through two electrodes that gives a vertical acceleration of 104 m/s2. The deflecting electric field is _____ MV/m.

Raindrops acquire an electric charge as they fall. Suppose a 2.4-mmmm-diameter drop has a charge of +12 pCpC. In a thunderstorm, the electric field under a cloud can reach 12,000 N/CN/C, directed upward.  For a droplet exposed to this field, how do the magnitude of the electric force compare to those of the weight force? What is the direction of the electric force?

In a salt crystal, the distance between adjacent sodium and chloride ions is 2.8×10−10×10−10 m. What is the force of attraction between the two singly charged ions?

An electron enters a region of uniform electric field with an initial velocity of 56 km/s in the same direction as the electric field, which has magnitude E = 50 N/C. (a) What is the speed of the electron 1.6 ns after entering this region? (b) How far does the electron travel during the 1.6 ns interval? (a) Number i 4.19E4 (b) Number i 8.056E-6 Units Units km/s um

At a particular moment, a proton is 10.0 cm away from a particle with charge 121 nC. If the speed of the proton at that time is  m/s towards the  particle, then what's its speed later when the proton is only 6.00 cm away?

The ink drops have a mass mmm = 1.00×10−11 kg each and leave the nozzle and travel horizontally toward the paper at velocity v = 15.0 m/s. The drops pass through a charging unit that gives each drop a positive charge q by causing it to lose some electrons. The drops then pass between parallel deflecting plates of length D0D0D_0 = 2.15 cm, where there is a uniform vertical electric field with magnitude E = 7.70×104 N/C.  1) If a drop is to be deflected a distance d = 0.340 mmmm by the time it reaches the end of the deflection plate, what magnitude of charge q must be given to the drop? Assume that the density of the ink drop is 1000 kg/m3 , and ignore the effects of gravity.