US$ 20.95
Compares 2-
and mid-ocean ridges
Used to add variable resistance while keeping the slide-wire wiper enclosed
holding pH stable at 25 degrees C for calibrating meters and electrodes at the standard low-acid reference point
the workhorse decade for introductory Wheatstone-bridge and Ohm's-law work
Optically Worked Double Convex Glass Lens, 75mm Diameter, 1000mm Focal Length Material_Brass Compares 2-Designed for parallel beam refraction work, this 75mm double convex glass lens at 1000mm focal length runs at f 13, near collimated for astronomical analogue and long throw projection setups.
US$ 20.95
US$ 547.50
US$ 500.00
US$ 547.50
US$ 212.50
US$ 58.00
US$ 34.95