Uma partícula com carga elétrica q1= 3,0 x I0^-7 C e outra com carga elétrica q2 = - 4,0 x I0^-7 C estão separadas pela distância d= 2,0 m. Calcule a intensidade da força elétrica exercida na partícula de carga elétrica positiva. Indique qual é a direção e o sentido dessa força.

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

The total amount of energy contained in an object

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b. b. at twice the distance, the magnitude of the field is 2b. c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.