Technician A says that the most accurate way to verify brake shoe to drum clearance is to perform a wheel-down brake adjustment. Technician B says that performing a wheel-up brake adjustment can identify problems such as drum warpage as well as set the shoe to drum clearance. Who is correct?

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.