Description acceptable. The mechanism that causes the W and Z bosons to have this property (10[1])is initiated by spontaneous (10[1])symmetry (10[1])breaking (-5[1])in a “Mexican (10[1])hat” potential. (10[5]-5[1])Neutrinos (10[1])were shown to have (10[1])this property (10[5]-5[2])by Super-Kamiokande’s (-5[3])(“KAH-mee-oh-KAHN-day’s”) discovery of neutrino (10[1])oscillation. (10[2]-5[1])Louis (10[1])de Broglie (10[4]-5[3])(“duh BROY”) theorized that particles (-5[2])with this property (10[1]-5[2])have a nonzero (-5[1])wavelength. (10[3]-5[3])The Higgs (10[3])field (10[1])causes (-5[1])some particles (-5[1])to (10[1])have (10[1])this (10[1])property. (10[13]-5[1])Particles (10[4])with this property (10[1])must (10[1])have a nonzero rest energy and cannot travel at the (10[1])speed of light. (10[13]-5[1])Objects with this property (10[1]-5[1])cause (10[1])four-dimensional spacetime (10[1])to curve (10[1])according (10[2])to general (10[1])relativity. (10[5])For 10 points, describe this property of objects measuring (10[1])more than zero kilograms. (10[2])■END■ (10[15]0[2])