Aparallel-plate capacitor in air has a plate separation of 1.76 cm and a plate area of
25.0

c
m
2
. the plates are charged to a potential difference of 255 v and disconnected from the source. the capacitor is then immersed in distilled water. assume the liquid is an insulator.

(a) determine the charge on the plates before and after immersion.

(b) determine the capacitance and potential difference after immersion.

(c) determine the change in energy of the capacitor.

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

Aloop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. a loop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. moving the loop outside of the magnetic field region. spin the loop such that its axis does not consistently line up with the magnetic field direction. change the magnitude of the magnetic field. change the diameter of the loop