Magnetic Inclination Needle for Earth Field Demonstration Capacity_50mL where colored liquid in a

where colored liquid in a U-shaped section shifts measurably as air blown through a constricted glass tube creates pressure differences

engine electronic control unit (ECU)

illustrating the Lorentz force as current crossing the magnetic field sets a low-friction wheel in motion

this resistance box at plus-or-minus 1% on each step replaces dozens of fixed resistors at the bench

a range box

Magnetic Inclination Needle for Earth Field Demonstration Capacity_50mL where colored liquid in aVertically pivoting magnetic needle that visualizes the dip angle of Earth's field, showing how inclination shifts from horizontal at the equator to vertical at the poles.