Aparticle of charge q is fixed at the origin of an xy coordinate system. at t = 0 a particle (m = 0.754 g, q = 2.01 µc is located on the x axis at x = 24.3 cm, moving with a speed of 49.8 m/s in the positive y direction. for what value of q will the moving particle execute circular motion? (neglect the gravitational force on the particle.)

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct