What's energy does the student have before he jumps of the bridge

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^?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?

7types of electromagnetic waves from lowest to highest frequency