problem 2. figure below shows two current-carrying loops with i1 = 4.00 a clockwise and i2 = 8.00 a counterclockwise, placed with their centers at the origin of the xy-plane. o = 4107 t·m/a. (a) if r1= 10.0 cm and r2 = 16.0 cm, what are the magnitude and direction of the magnetic field due to the two loops at the origin? write your answer in unit vector notation. (b) if r1 is held constant at 10.0 cm, what would r2 have to be for the total magnetic field at the origin to be 0?

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.

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.

Why do different substances have diffrent properties