Aparallel plate capacitor is connected to a battery that has a potential difference of 200 v. once charged, each plate on the capacitor holds a charge of 5.0 × 10-9c. what is the capacitance of the parallel plate capacitor? a. 2.0 × 10-6 f b. 2.5 × 10-11 f c. 5.0 × 10-11 f d. 1.0 × 10-6 f

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

Which of the choices are parts of an atom? select all that apply. a.) compound b.) electron c.) neutron d.) molecule e.) photon f.) proton g.) element