Jerk is this derivative of position with respect to time.
Planck's constant is raised to this power in the denominator of the formula for the Rydberg constant. The power needed to overcome the drag force is proportional to this power of velocity. The electric field of a dipole falls off as this power of the distance from it. According to Kepler's second law, orbital period squared is proportional to this power of major axis length. This is the smallest value of n for which the nbody problem is not generally solvable. Jerk is this derivative of position with respect to time. For 10 points, an object's volume is commonly expressed as what exponent of its length units, such a sphere, whose volume equals four-thirds times radius to this power?
Planck's constant is raised to this power in the denominator of the formula for the Rydberg constant.
three [or third or cubed]