Final answer:
The question involves calculating the initial acceleration of a proton in a specific electric field using the charge of the proton, the electric field strength, and Newton's second law.
Step-by-step explanation:
The subject question asks to calculate the initial acceleration of a proton released from rest in an electric field inside a parallel-plate capacitor. The proton experiences a force due to the electric field, which can be calculated using the formula F = qE, where F is the force on the proton, q is the charge of the proton, and E is the electric field strength. The charge of a proton is approximately 1.60×10-19 coulombs, and the given electric field strength is 5.40×104 N/C. Once the force is calculated, Newton's second law (F = ma) is used to find the acceleration, a, with m being the mass of the proton (approximately 1.67×10-27 kg).