Air breaks down and conducts charge as a spark if the electric field magnitude exceeds 3.00 ✕ 10^6 V/m. (a) Determine the maximum charge Qmax (in C) that can be stored on an air-filled parallel-plate capacitor with a plate area of 1.65 ✕ 10^−4 m2.

(b) A 68.0 µF air-filled parallel-plate capacitor stores charge Qmax. Find the potential difference across its plates (in V).

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.