Lenses - Glass with ground edges - Double Concave

The Mechanics System 2 Physics Kit includes 36 components for 14 guided activities. With this kit students can explore common experiments such as Boyle/s Law, The Cartesian Diver, and Bernoulli's Principal. 14 experiment guides included: Water Pouring from a Spout, Mariotte's Bottle, The Force…

The Ballistics Car demonstrates that the horizontal motion of an object is unaffected by forces which act solely in the vertical direction. The car's low-friction wheel bearings allow it to coast at an essentially constant speed. If the spring in the gun is triggered while the car is coasting, the…

This ingenious device offers a practical and economical solution for light measurements in a variety of learning situations. Whether measuring environmental light or quantifying an optical experiment, this compact luxmeter meets the need. For most uses, the autoranging feature makes this a…

Suitable for miniature base lamps. Accepts all replacement bulbs listed on this page. Plastic base, with brass screw type receptacle and two terminals. Miniature Bulbs for use with lamp boards and lamp/bulb holders.

Painted Red and supplied with a keeper. Available in 3"; (left photo) or 1"; (right photo)

This premium set includes a stand, rod clamp and ring, all in one packages - eliminating the need to piece together a system for your classroom or lag. Everything is in one box. Stainless steel rod with a powder coated base provides the perfect setup for any experiment. Made from…

The unit measures the velocity of sound in the air. Partially fill the resonance tube with water and then sound a tuning fork of known frequency at the tubes open upper end of the Resonance Tube. The water level can be adjusted until the air in the tube resonates at the same frequency as the tuning…

This Electricity System 1 Physics Kit comes with 51 components, including a Circuit Board, and all the resistors, lamps, voltmeters and ammeters one needs to investigate core concepts in introductory electricity. With this kit students can explore common experiments such as Ohms Law, Series and…

This large van de Graaff generator uniquely offers alternative drive modes, either hand-cranked or motor driven. Excellently constructed, the generator reliably delivers charge and sparks 10cm long and more immediately on setting it in motion, even under high humidity conditions. In hand-cranked…

This device can be used as a classic standard calorimeter or as an electric calorimeter. Made of aluminum and plastic, the calorimeter has a diameter of 10cm, height of 11cm, liquid capacity of 175ml, and a heat capacity of 25J/°C. Electrical requirements are 6V DC, up to 2A.

Ideal for demonstrating series and parallel circuits. Lamp Boards are supplied with spare bulbs and an activity guide.

A Gyroscope is a fascinating mechanical device that at time seems to defy the laws of gravity. The unique characteristic of a gyroscope is that once it is set spinning, it tends to want to remain in its original plane regardless of rotation of its housing. The tendency to resist change in direction…

An essential accessory for experiments with the popular Bicycle Wheel Gyroscope as well as for demonstrating the effect of moment of inertia on rotational motion (the “spinning skater effect”), this economical Rotating Plate spins freely due to its heavy duty ball bearing axle. Features…

These rubber balloons work perfectly to replace those found in our Deluxe Lung Model Apparatus. Size 9 inches. Sold in a pack 12.

This micrometer is made of hardened steel for precision and durability. Its range is 0-25 MM and it has a precision rotary scale with a resolution of 0.01 MM, a ratchet thimble, and a locking lever. Instructions are included. Shipping weight: 9.5 Oz., dimensions: 6" x 4" x 1.5".

This 25 foot / 7.5 meter metal blade tape measure is 1" wide and is scaled in 1/16" increments on one side and 1mm increments on the other side. Features an easy to read lockable, retractable yellow blade and high-impact ABS case.

The Earth/sun system demonstrates the seasons, eclipses, and the phases of the moon. The sun has a LED that sends a spot of light onto the Earth. The sun turns with the handle as the user changes the seasons. The moon revolves around the Earth as the Earth rotates around on its axis. The angle of…

The clear plastic 6" / 15cm ruler is scaled in 1mm increments on one side.

This sturdy pulley is excellent for use with an inclined plane or any other similar apparatus. Ite features a 4-cm plastic pulley mounted on a chrome plated steel rod. The overall length is 15cm and the shaft diameter is 8mm.

Electroscopes are used to detect and roughly measure the electric charge on an item. This electroscope has a round case, a free-spinning pointer, and a gauge. PRODUCT WARNINGS WARNING: This product can expose you to chemicals including benzene, nickel, and lead, which are known to the…

Weights are made of brass, with nickel plated surfaces. All weights are carefully tested and calibrated. Analytical Weight Box contains a total of 9 weights from 1 to 100 grams, in polished wooden box, with fractional weights, rider and forceps.

Magnifying Glass with Glass lenses molded into high quality unibody plastic frames.

Provide students with an understanding of voltaic cells by having them create their own Teach students about reduction-oxidation reactions Allows students to create their own experiments in a guided fashion Includes comprehensive activity guide and student worksheet master copies See below for…

The Snaky Spring is 2cm in diameter, 180cm long, and can be extended up to 5 meters. The spring is an excellent demonstration of wave theory concepts such as longitudinal waves and wave behavior. It is also included in the Wave Demonstration Set . Instructions included. PRODUCT WARNINGS …

Glass lens is made of polished optical glass. 24A00B457 This double-concave glass lens measures 75mm in diameter and has a focal length of 20cm. Sold in a pack of 20 lenses. 24A00B458 This double-convex glass lens measures 75mm in diameter and has a…

Our Lenz’s Law apparatus is a simple and effective way to demonstrate induction and Lenz’s Law of electrodynamics. The metal hoops (one open and one closed) are freely moving on a centrally mounted pin. When a magnetic field is introduced to the closed loop from a bar magnet, an electrical…

The Newton’s Rings Apparatus consists of a plano-convex lens on top of a flat glass plate, held together by a plastic frame. The pressure between the lens and the plate can be adjusted by means of three thumbscrews.

Electra dough allows students to play with materials that are fun, non-threatening, and familiar, all while learning the basic concepts of electrical circuits. This conducting dough, as the name implies, can conduct electricity to form any circuit that you can mold. Our dough is natural,…

Aluminum Ball Drilled for lab demonstrations Approx. 2.5mm drilled hole Drilled aluminum ball - can be used for Collison and pendulum demonstrations. Aluminum ball can be used for hobbies and various other things. Approx. 2.5mm drilled hole

This clear plastic 12" ruler is scaled in 1/16" increments on one side and MM on the other.

Inflatable world globe features country capitals, important cities, time zones, international boundaries and geographic features. The globe is 10” tall and 12” wide when inflated.