A particle with charge –3.24 × 10-6 coulombs is released at rest in a region of constant, uniform electric field. Assume that gravitational effects are negligible. At a time 2.36 seconds after it is released, the particle has a kinetic energy of 1.28 × 10-10 joules. How long after the particle is released has it travelled through a potential difference of 0.251 volts? Answer_________s