An charged particle with a mass m and charge q initiate from a point P on y axis with velocity v0, and the angle between v0 and y axis is theta. By applying a circular edged uniform magnetic field B perpendicular to xy plane on the path of the particle, the particle reach a point Q on x axis with a velocity perpendicular to x axis. Where m, q, B, v0 and theta are positive quantities with appropriate units. What is the minimal possible area of the magnetic field applied

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.