An electron moving with a speed of 8.4 105 m/s in the positive z direction experiences zero magnetic force. When it moves in the positive x direction it experiences a force of 2.1 10-13 N that points in the negative y direction. What is the magnitude and direction of the magnetic field?
magnitude T

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c. m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?