Apoint charge is placed at each corner of a square with side length a. the charges all have the same magnitude q. two of the charges are positive and two are negative, as shown in the following figure. q: what is the magnitude of the net electric field at the center of the square due to the four charges in terms of q and a?

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

What are the necessary conditions for fusion?