Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charge?
A) 3.0 × 10-6 N
B) 4.5 × 10-6 N
C) 5.4 × 10-6 N
D) 7.2 × 10-6 N
E) 9.0 × 10-6 N
C
You might also like to view...
A 3.0-kg block is on a horizontal surface. The block is at rest when, at t = 0, a force (magnitude P = 12 N) acting parallel to the surface is applied to the block causing it to accelerate. The coefficient of kinetic friction between the block and the surface is 0.20 . At what rate is the force P doing work on the block at t = 2.0 s?
a. 54 W b. 49 W c. 44 W d. 59 W e. 24 W
When a steady voltage is across one-half as much resistance, the current
A) is half. B) remains the same. C) is doubled. D) is quadrupled.
An 800-kHz sinusoidal radio signal is detected at a point 2.1 km distant from a transmitter tower
The electric field amplitude of the signal at that point is 0.80 V/m. Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed. What is the intensity of the radio signal at that point? (?0 = 8.85 × 10-12 C2/N ? m2, ?0 = 4? × 10-7 T ? m/A, c = 3.0 × 108 m/s) A) 4.2 × 10-4 W/m2 B) 1.7 × 10-3 W/m2 C) 8.5 × 10-4 W/m2 D) 1.2 × 10-3 W/m2 E) 6.0 × 10-4 W/m2
One of the unusual features of the Earth's moon is that it is
A) very large B) very small C) made mostly of rock D) keeps one side facing the Earth