Can a black light be used to charge a solar powered product

Aparticle with mass 1.81×10−3 kg and a charge of 1.22×10−8 c has, at a given instant, a velocity v⃗ =(3.00×104m/s)j^. what are the magnitude and direction of the particle’s acceleration produced by a uniform magnetic field b⃗ =(1.63t)i^+(0.980t)j^?

What was the first instrument to ever record an earthquake?

Ain is , is 's of ? 0.62 0.79 1.27 1.50