If the distance between a neutral atom and a point charge is quadrupled, by what factor does the force on the atom by the point charge change?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Does heating a metal wire increase or decrease its electrical resistance? why?

Which sentences describe point source pollution? in this type of pollution, the source of the pollution is single and easily identifiable. when runoff water from the melting of snow mixes with debris, it creates pollution. the runoff water, mixed with pollutants, reaches large areas with disastrous effects. alternatively, when a wastewater treatment plant releases harmful chemicals into a stream, the chemicals pollute the stream water because they are not treated for safety.