A parallel-plate capacitor consists of two plates, each with an area of \(28 \mathrm{~cm}^{2}\), separated by \(3.0 \mathrm{~mm}\). The charge on the capacitor is \(8.3 \mathrm{nC}\). A proton is released from rest next to the positive plate. How long does it take for the proton to reach the negative plate?