Identical charges qare placed at the vertices of the regularn-gon. what chargeqshould be placed in the center of then-gon in order for the system to be in equilibrium? explain mathematically by calculating the electric field, flux, and force due to the charges.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

The process of a material going through a change of state from a gas to a liquid

The voltmeter reads 117 v and ammeter reads 0.13 a .if the resistance of ammeter and voltmeter are 9 kilo ohm and 0.015 ohm respectively ,find the value of r. 3marks