Physics Answers

Explain the Maxwell first equation.

Derive the relation between impulse and momentum.

Two point charges are fixed on the y axis: a negative point charge q1 = -27 μC at y1 = +0.21 m and a positive point charge q2 at y2 = +0.37 m. A third point charge q = +8.8 μC is fixed at the origin. The net electrostatic force exerted on the charge q by the other two charges has a magnitude of 25 N and points in the +y direction. Determine the magnitude of q2.

Two particles, with identical positive charges and a separation of 2.83 × 10^-2 m, are released from rest. Immediately after the release, particle 1 has an acceleration a1 whose magnitude is 5.56 × 10^3 m/s2, while particle 2 has an acceleration a2 whose magnitude is 11.7 × 10^3 m/s2. Particle 1 has a mass of 8.95 × 10^-6 kg. Find (a) the charge on each particle and (b) the mass of particle 2.

A 4.8 μC point charge is placed in an external uniform electric field that has a magnitude of 72000 N/C. At what distance from the charge is the net electric field zero?

A tiny ball (mass = 0.010 kg) carries a charge of -22 uC. What is the electric field magnitude that would cause the ball to float above the ground?

A small object has a mass of 3.0 × 10^-3 kg and a charge of -37C. It is placed at a certain spot where there is an electric field. When released, the object experiences an acceleration of 3.4 × 10^3 m/s2 in the direction of the +x axis. Determine the electric field, including sign, relative to the +x axis.

Two charges are placed on the x axis. One of the charges (q1 = +7.86 uC) is at x1 = +3.00 cm and the other (q2 = -22.3C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm.