Please help! when a wave is reflected does it come out at the same angle or is it slightly curved?

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

An uplifted block of rock between two normal faults

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^?