Point charges Q1 and Q2 of +12 nC and -12 nC, respectively, are placed 10.0 cm apart . This combination of two charges with equal magnitude and opposite sign is called an electric dipole. Compute the resultant electric field (magnitude and direction) at:point a, midway between the charges Q1 and Q2. point b, 4.0 cm to the left of Q1.

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Which terms describe the purpose of antennas on devices that use radio waves? transmit and receivemodify and amplifyamplify and receivemodify and transmit