Two particles are 15 meters apart. Particle A has a charge of 6.0 • 10-4 C, and particle B has a charge of 5.0 • 10-4 C. The resulting Coulomb force is 12 N. At the same distance, what combination of charges would yield the same Coulomb force?

A. Particle A: 8.0 • 10-4 C, and particle B: 3.0 • 10-4 C

B. Particle A: 12.0 • 10-4 C, and particle B: 2.5 • 10-4 C

C. Particle A: 9.0 • 10-4 C, and particle B: 8.0 • 10-4 C

D. Particle A: 9.0 • 10-4 C, and particle B: 3.0 • 10-4 C

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?

Which diagram represents the phase tha occurs after a solid melts?