Question

please help me I am have problem understanding this question

1)A very long straight wire has charge per unit length 1.48×10⁻¹⁰ C/m . At what distance from the wire is the magnitude of the electric field equal to 2.53 N/C ? Use 8.85×10⁻¹² C2/(N⋅m2) for the permittivity of free space, and use π=3.14159.

2)A −12 nC charge is located at (x,y)=(1.0 cm, 0 cm).

PART A) What is the electric field at the position (x1,y1)=(5.0 cm , 0 cm) in component form? Express your answer in terms of the unit vectors i^ and j^. Use the 'unit vector' button to denote unit vectors in your answer.

PART B) What is the electric field at the position (x2,y2)=(−5.0 cm , 0 cm) in component form? Express your answer in terms of the unit vectors i^ and j^. Use the 'unit vector' button to denote unit vectors in your answer.

PART C) What is the electric field at the position (x3,y3)=(0 cm , 5.0 cm) in component form?Express your answer in terms of the unit vectors i^ and j^. Use the 'unit vector' button to denote unit vectors in your answer.

3)A small glass bead has been charged to + 40.0 nC . A small metal ball bearing 1.20 cm above the bead feels a 1.90×10⁻² N downward electric force. What is the charge on the ball bearing?Express your answer with the appropriate units.

Answer 1