Magnitude and direction of electric fields? ?
how would you do the following? a small object a, electrically charged, creates an electric field. at a point p located 0.250m directly north of a, the field has a value of 40.0n/c directed to the south. what is the charge of object a? (a)1.11×10^-9 c (b)-1.11x10^-9 c (c)2.78x10^-10 c (d)-2.78x10^-10 c (e)5.75x10^12 c (f)-5.75x10^12 c

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.