The conclusion that people have been fishing for food for thousands of years, and that they fished for larger fish in deeper waters is supported by which of the following discoveries? discovery of large ancient boats and oars in human caves
discovery of the bones of ancient deep sea fish in human caves
discovery of ancient spear tips for stabbing the fish in coastal settlements
discovery of the bones of ancient deep sea fish buried in coastal settlements

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?