1b) Jamal bought a bicycle with the money he earned working. When he rides his bicycle to work instead of walking, he only burns about 100 Calories. Express his efficiency in distance traveled per
Calories spent

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.