A property with this name has “cutoff” values that quantify the blocking of cosmic rays in Earth’s atmosphere due to geomagnetic shielding, which are typically on the order of 10 GV (“G-V”). A “strong” theorem named for this property states that the event horizon of a fixed black hole must be a Killing horizon and was proven by Stephen Hawking. A property with this name equals the ratio of linear momentum to charge for a particle in a beam, and measures the extent of the deflection of particles in a magnetic field. The disk in Ehrenfest’s (10[1])paradox (-5[1])exhibits a strict property with this name (10[3])that cannot hold in special (10[1])relativity (10[1])and was proposed by Max Born. (10[1])A property (10[1])with this (10[1])name requires all pairs of points within an object to remain the same distance apart (10[2])during (10[1])motion. (10[4])For (10[1])10 points, (10[1])what (10[1])property (10[1])is possessed by non-deforming “bodies”? (10[1])■END■