Which of the following is the best definition of work? a. something that happens when a force is applied to an object and the object moves. b. the amount of force that you apply an object. c. the distance over which an object travels with time.

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^?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

How do we measure or think of speed in the united states?