Read the hypothesis below.
hypothesis: if a steel surface is wet with water, then the friction will be reduced.

which question best matches this hypothesis?
a. how is water affected by the force of friction?
b. how will water affect the force of friction?
c. does water or steel have a greater frictional force?
d. what is the force of friction of water?

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?