"serv Dial Sud & sars"

Highly evacuated electron tube with focusing electron gun and fluorescent screen inclined relative to the beam axis, so that the path of the beam can be seen and the effects of electric and magnetic fields can be studied. The electron beam can be deflected electrically in the electric field of the built-in plate capacitor, and magnetically by using the Helmholtz coil pair (not included). By adjusting the electric field so that it cancels the magnetic deflection, it is possible to determine the specific charge (e/m) and the velocity of the electrons.

Robotics for grades 3 to 5.

Torsion of Metal Rods Apparatus shows students the affect of a torque on a metal rod.

Visualize acceleration and centripetal force with this unique device.

This module has enough program space, execution speed, and I/O pins for many applications.

The Parallax Standard Servo is ideal for robotics and basic movement projects.

Parts to learn how a microcontroller works.

Wooden Geometric Shapes - 16 Various pieces, in wooded box.

For density determinations, set of twelve in assorted sizes, shapes and masses.

Set of 12 Polypropylene bars of different length but the same diameter.

Set of 12 Delrin cylindrical bars of different length but the same diameter.

Fourteen materials in the form of rectangular blocks.

A working gauge is mounted in a transparent case so the actual working parts are visible.

Economical pulley for simple machine experiments.

Low friction cart for kinematics.

Sold wood and aluminum dynamics cards used for collision experiments.